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How do all of the ninjas that are following these lectures after covering the previous lecture where

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we went over the segments, now it's time to show the answers for the assignments, which, as I said,

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are a bit challenging.

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And as you might experience, as they have a combination of a lot of topic, lots of topics mixed together.

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All right.

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So as soon as you open the project, as always, create a new file, you can call it for loops practice.

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All right, and also here for Loop.

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Practice and before beginning and just going to copy here all of the rules that we had.

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All right.

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Like this.

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All right.

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And as you can see here, it's all marked in green.

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It's the same as doing like this.

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All right.

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So this code will be ignored.

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And the reason it's in green, because I put these three quotation marks at the beginning and at the

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end and everything that I write in between is a comment.

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All right.

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So these are the demands of the assignment and this is the list that we need to address to.

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And I'm just going to copy it as the beginning, because it's the same list.

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No thinking is applied here.

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So create a list of businesses.

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All right, so right here we have the list of businesses that we need to apply the rules about and let's

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begin.

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All right.

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So first of all, let us create a loop and the loop will be full loop and we shall have an in part in

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businesses business.

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We need to put business.

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And as you can see, we have an error here because we need to pull something off the floor and I'll

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call it single income like this.

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All right.

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So we have the whole list right here.

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And we have the single income, which is one sale out of these these guys right here and inside the

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follow.

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We're going to do the following thing.

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We're going to, first of all, break down all of these four sections right here because we want to

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have some statements which will limit the taxes according to these incomes.

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Right.

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This is the only way to do it.

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So let's begin with the first one.

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If single income is between is bigger or equals one, because we don't want to take taxes from someone

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who doesn't make any profit.

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And and we use and because we have these two limits, so we want something to be bigger than one and

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smaller than two thousand is the way to do.

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All right.

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Single income like this, smaller equals than two thousand.

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All right.

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Because if we put some, for example, or here, so we're going to get under here under the if only

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values that are one or two thousand and we don't want it.

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We want to get everything which is between one and two thousand and not to get one or two thousand.

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Right.

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And now the thing that we want to do is take a single income and take five percent out of it.

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Right.

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So how do we do it?

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How do we take five percent, which is doing the following thing?

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All right.

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We're doing the following thing.

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We're taking we're multiplying it by zero dot zero five.

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This is five percent.

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All right.

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So and how how do I go to this conclusion even without knowing any mathematics if we do this thing?

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All right.

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So if we do this thing, we multiply as any number multiplied by one, we will get a hundred percent.

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Or in other words, we're going to get this value again.

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Right, because we got the 100 percent.

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But in this case, we want to get only five percent out of the whole value.

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So to get five percent, we need to multiplied by zero zero five.

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OK, so once we multiply like this, we want to put this value inside something.

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Right?

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So let's create an additional variable which which we can call it tax.

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Right.

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Like this.

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And this is what we're going to do.

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We're going to take the value, for example, one thousand five hundred multiplied by zero zero five.

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And this will be the tax that we got from it.

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OK, so we're going to do the same thing for the second element as well.

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If a single income is bigger or equals to 2001, because here we go up until 2000 and we don't want

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to put 2000 here as well, because then there is the same number here and here and it's collides.

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It's not good for us because the same number can go higher and higher as well.

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And it's not good for us.

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So we will start off 2001.

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All right.

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And single income up until how much do we have here?

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5000 like this.

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All right.

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And again, we just copy this thing and just change the the number of the tax percentage at the end.

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And what you want to put here is 10 percent of 10 percent is not one.

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All right.

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Afterwards, if single income bigger equals to five thousand and one and single income is smaller equals

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to fifteen thousand, I'm just applying like what I found here in this section.

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I'm just applying to you, applying the same thing here.

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And here as well, it's the same rule.

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OK, you see, I'm not just I'm not like investing any thinking after I figured out what to do here.

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I'm just copying the same thing, just changing the numbers here, here and here.

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OK, changing the limit.

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All right.

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Which the limit is this this thing right here and changing the taxes.

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The part right here.

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OK, this the only thing I'm doing.

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All right.

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So now we have five, a 500000.

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And for that we have we need to copy this thing again and copy it basically here.

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And for this thing, we need to take 15 percent.

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All right.

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And the last condition that we have is right here above 15000 will pay 17 percent for gross income.

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So everything which is not this thing, because here we covered all the numbers.

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We covered all the numbers from one to.

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Five fifteen hundred fifty fifteen, fifteen thousand, sorry, so we covered here fifteen thousand,

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OK, and now we're going to say else, which is everything which is bigger than fifteen thousand will

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be here and we're going to take taxes, which is 17 percent.

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And just going to copy this again and put it here and change it to 17 percent like this.

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OK, and we're done with a part of taking taxes.

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All right.

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And now I'm just going to use backslash backwards backspace, OK?

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Because I don't want to write code inside the house anymore.

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And I want to put it outside of the if else.

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OK, so where the cursor is blinking right now, it's outside this if else.

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OK, this is outside that if else.

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OK, all right.

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Just remove redundant spaces, OK.

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And right here I would like to do the following thing.

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I'm going to create a new variable net income.

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Yeah.

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And I'm going to do a single income.

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Minus tax.

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OK, so what I did here is take the single income, which is this number right here, for example,

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OK, and I'm going to remove the taxes, OK?

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So, for example, the result of here is going to be five percent, OK, this the tax number is five

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percent out of this number.

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OK, so let's say, for example, that for the first number, five percent is like 15.

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Just guessing know without calculation, just guessing 15.

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OK, for example.

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So if it's 15, I'm going to take the single income, which is the whole income right here, and I'm

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going to reduce the tax.

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OK, so I'm doing one thousand five hundred minus 15 and this will give us that net income.

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OK.

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Net income with this net income, what are we going to do is obviously is this section right here,

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OK, because we need to calculate the net income right here and reduce two percent out of it to find

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out what is the health care.

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All right.

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What is the health care amount that we need to pay?

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All right.

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So we're going to do the following thing now.

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We're going to calculate the calculate the income.

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After health care.

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Reduction, because this is what we were asked to do in the fifth section right here, just want to

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print it, just get the net income after reducing the two percent here and just print it.

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All right.

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Just print it.

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So this would be the net income.

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All right.

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Multiplied.

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By two percent.

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Yeah, and right, like the the health care reduction is two percent, two percent.

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Correct.

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So instead of doing reducing two percent and then then taking the net income and deducting this number,

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this number out of the net income, which is going to do the following thing.

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OK, zero dark.

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Ninety eight.

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OK, so we're taking the whole net income and we're multiplying it by 98 percent.

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And this would be the 98 percent that we have after reducing the health care right here.

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OK, so this results right here will take the net income and reduce two percent out of it because we're

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multiplying it by 98 percent.

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Is taking the net income multiplying it by 98 percent?

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This will give us the the income after reducing the health care.

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OK, it's a bit mathematical here, but this is the whole point, right?

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Like combining several topics all together.

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Correct.

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OK, we're good this far.

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Let's print it.

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OK, print printing income after health care reduction.

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Guaranteeing income after health care reduction.

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All right, so we're done with this part and now we're going to head off to the last part, OK, am

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right here.

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Calculate the total tax you got from the give in to businesses in the list, excluding health care.

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So we're just ignoring this pass right here, ignoring it, completely ignoring it completely, because

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for us, this thing doesn't doesn't come into calculation once we are talking about reduction of taxes.

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So we're going to do the following thing.

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Right.

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Total taxes.

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Is.

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Total taxes.

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Lost X.

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OK.

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So you see here.

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Total taxes can be you see that what I'm doing.

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You just need to learn from this practice as well.

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You see, I have here a brownish background like patroness, trying to tell me there is something wrong.

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It's not an error because it's not red, but something is a bit wrong.

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All right.

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So hovering over it, I can see name total taxes can be undefined, meaning that there can be a case

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where total taxes will have no value at all.

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OK, so he wants me to define it to something.

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Doesn't matter what does something.

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So I'm just going to define it here outside of the loop.

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Total taxes, but zero here or even the keyword, none like this.

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And just to define it to something so he won't shout at me here and it's none.

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OK, so let's see what I did here.

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OK, well, let's see what I did here.

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What actually did here is the following thing.

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Let's say we're going for the first run.

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We're taking this value and we're starting to run over the loop here.

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OK, so we have one thousand five hundred going from the top.

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And are we going inside this IEF?

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Are we.

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Yes.

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Yes, we are.

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Why?

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Because it's one thousand five hundred.

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It comes inside this limits right here, correct?

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Yeah.

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OK, now what happens?

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We're taking the single income, which is the one thousand five hundred, multiplying it by five percent.

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OK, this will give us the tax that we get from that 100 percent.

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OK, this is the one hundred percent.

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One thousand five hundred is the whole number, the one hundred percent.

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We want to know how much is five percent out of this whole number.

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And this is the tax.

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So we got the text of the first number going downwards with the code, are we doing something in this?

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If no, because we already got into the first if something, he'll also know something inside the house.

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Also, nothing happens here.

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OK, we now completed the if al spot.

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Now we're coming to this pass right here.

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Right.

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So here we have the following thing.

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OK, here we're taking the tax that we have, OK, the tax from here, this value that I'm marked right

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here, taking the tax and we're taking the single income, OK, which is this one, one thousand five

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hundred.

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And we're reducing from the single income.

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The Texas.

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OK, this will give us the net income, this is the net money that we're going to have in our hands

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after we're reducing the taxes.

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OK, after we completed this thing, now we want to know right here, as we already discussed, all

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businesses will pay additional two percent full health care from the net income.

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OK, just print it.

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So we're having here getting the net income that we have, net income and we want to know how much money

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do we have in our hands after using these two percent?

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OK, so in total, we have 19, eight percent of our salary.

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So just take the net income and multiply by 98 percent.

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OK, so this is the money that we have after paying for health care.

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Then we're going to the seventh section right here, six section, sorry, while excluding health care.

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So this part for us, it does not exist anymore at all because now we're in the sixth section and it

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says here, exclude health care.

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So we ignore this part completely.

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We don't care about it.

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Here we did some calculation.

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We created a new variable income after a health care reduction.

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But this net income stays the same.

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OK, stays the same.

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And actually, we don't care about it at all.

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OK, because now we're going to deal with the taxes.

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This part right here talks about the taxes.

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We don't care about net income, not that income.

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We don't care about it.

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00:17:10,890 --> 00:17:17,160
Now we're talking the taxes, the tax already collected here and it's safe for us in waiting for us.

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Nothing happened with this tax value.

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It stays the same as we started going from top to bottom.

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00:17:23,490 --> 00:17:26,400
So we have already a number here of tax, OK?

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00:17:27,510 --> 00:17:35,930
And in this part right here where we want to know what is the total tax you got from the given 10 businesses.

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So this loop here is going to go once, twice, three times, four times and so on until we complete

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the whole list right here.

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Correct.

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The whole list right here.

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It's going to go around at around 10 times, right?

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One, two, three, four, five, six, seven, eight, nine, 10 times.

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Going to go again and again and again.

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And we need to somehow collect in each cycle the taxes that we got.

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OK, so what I'm doing right now in this section right here, I'm just creating a new variable, which

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equals to nothing, OK?

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It equals nothing at the beginning.

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What's going the first time?

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It equals to nothing.

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And I'm saying the following thing.

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Take nothing and the first time and add that tax number.

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OK, we got the tax number from here at the first time and just take nothing, plus the tax that we

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got from the first cycle, OK, and put it inside here inside the total, for example, to make it easier

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for us to understand, let's say that we got in Texas here we got the number one.

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OK, just for the example, just for the theoretical example, let's say we have the number one here.

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OK, so there is nothing plus one.

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And all of this part, all of this part goes into here.

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So once getting to this goal, once getting to this goal right here.

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Right.

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We're having one here, OK, then we're finished now and this part right here, the first loop cycle

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finished and here we have one starting again with the second cycle, taking this number, going through

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all of this loop right here, going inside this part, inside this IV here.

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By the by the way, it's not if it's elif of course this also elif.

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Yeah.

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Because if we have more than one, if we use out if elif and at the end we use else in the second part

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we're starting from the top and we're seeing here the number two thousand five hundred forty two.

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It doesn't fit here because it's bigger than two thousand and the number of feeds over here.

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00:19:57,180 --> 00:20:05,550
Again we take the taxes OK and going downwards and coming to this line again.

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00:20:06,280 --> 00:20:08,940
OK, you remember what number we have here.

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We have here one.

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Right.

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And then we calculate this thing again.

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So here in total taxes, we have one from the previous cycle and then we adding it to the taxes that

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00:20:24,240 --> 00:20:31,710
we got from the second cycle, from this number, OK, from this number we got here in the second cycle,

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inside this part, inside this ELIF and we got a tax number from here.

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So we taking that one number, number one that we got from the first cycle and adding it to tax variable.

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Tax variable is the taxes that we have taken from this variable right here.

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Correct.

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00:20:53,790 --> 00:20:59,880
So then in the second cycle, what we did here, we took the taxes from the first cycle and added it

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00:21:00,000 --> 00:21:03,660
to the number from taxes from the second cycle.

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And all of this got into total taxes.

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And then in the third cycle, we have Texas from cycle number one and number two, and they're added

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00:21:16,210 --> 00:21:20,890
to Texas from cycle number three and so on and so on.

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00:21:20,920 --> 00:21:26,980
So what eventually happens here that in Texas we have eventually at the end, once we finish this thing

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00:21:26,980 --> 00:21:34,630
as well, we have our total taxes summed up again and again and again until we have all the taxes collected

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over here.

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All right.

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00:21:37,780 --> 00:21:47,470
So now once we have it, let's go to the end of the to the most left part here, because we want to

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00:21:47,470 --> 00:21:51,310
be outside of the loop now, OK, outside of the for loop.

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00:21:51,460 --> 00:21:54,880
And as long as we have indention like this, we're inside the loop.

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Once we do backspace, we're outside of loop.

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00:21:58,960 --> 00:22:11,800
And now I just want to print print the sum of print, total of taxes, OK, loss casting total of taxes.

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00:22:12,320 --> 00:22:14,320
OK, that seems correct.

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00:22:14,650 --> 00:22:16,870
Let's run it and see what happens.

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00:22:18,360 --> 00:22:19,430
And we have an error.

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00:22:19,500 --> 00:22:30,030
OK, so we have unsupported operator type plus non type and float in line number 46 and we're seeing

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00:22:30,030 --> 00:22:31,930
here that we have some kind of error.

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00:22:32,010 --> 00:22:35,330
Correct, because we're trying some type error.

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00:22:35,340 --> 00:22:37,230
Unsupported operand.

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00:22:38,860 --> 00:22:46,170
So we have some kind of error, we have types for the plus because we cannot add a non type and float.

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00:22:47,170 --> 00:22:55,150
So I think the arrow is right here because we cannot add none to a number, so let's just zero here.

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00:22:56,590 --> 00:22:57,600
Let's run it again.

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00:22:59,270 --> 00:23:03,170
All right, all right, so I think we're good now.

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00:23:04,790 --> 00:23:10,310
OK, so right here you can see the printing income after health care reduction.

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00:23:10,670 --> 00:23:12,400
And let's just check ourselves.

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00:23:12,410 --> 00:23:18,320
So we're seeing here, by the way, let's do an additional thing we're seeing here, the printout of

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00:23:18,740 --> 00:23:21,170
income after health care reduction.

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00:23:21,180 --> 00:23:21,740
Correct.

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00:23:22,110 --> 00:23:23,900
But I want to do an additional thing.

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00:23:24,140 --> 00:23:30,520
I want to print the print print of the tax variable.

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00:23:30,830 --> 00:23:32,560
Yeah, I just want to print it as well.

335
00:23:35,060 --> 00:23:35,630
All right.

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00:23:37,420 --> 00:23:47,860
And after these two printed, let's just do print and do have some spaces, so be more ordered for us

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00:23:47,860 --> 00:23:48,410
like this.

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00:23:49,450 --> 00:23:51,640
All right, so let's go to the top.

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00:23:51,670 --> 00:24:00,040
OK, so from the first one from this guy right here, one thousand five hundred, we took seventy five

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00:24:00,220 --> 00:24:02,530
dollars tax, OK?

341
00:24:02,800 --> 00:24:06,310
And then we have Brint income after health care reduction.

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00:24:06,550 --> 00:24:10,720
It's one thousand three hundred ninety six.

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00:24:11,940 --> 00:24:21,330
OK, so basically this is the tax that we took, OK, and this is the present income after health care

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00:24:21,330 --> 00:24:21,930
reduction.

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00:24:22,020 --> 00:24:22,350
All right.

346
00:24:22,800 --> 00:24:29,760
So let's just verify using a calculator and let's calculate if it's correct.

347
00:24:30,180 --> 00:24:32,700
OK, so we have 1500.

348
00:24:33,000 --> 00:24:43,880
OK, and first of all, we're reducing five percent, five percent taxes, so let's multiplied by zero

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00:24:44,120 --> 00:24:44,980
zero five.

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00:24:45,810 --> 00:24:49,800
So 75 is the same as we have here in the tax printout.

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00:24:50,430 --> 00:24:57,870
And once we reduce the taxes, we have the net income income, which is one thousand five hundred minus

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00:24:57,870 --> 00:24:58,850
75.

353
00:24:59,160 --> 00:25:00,450
This is our net income.

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00:25:00,720 --> 00:25:01,180
OK.

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00:25:01,440 --> 00:25:09,720
And from this summary right here, the net income, we're going to check out how much is 98 percent

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00:25:09,720 --> 00:25:10,170
of it.

357
00:25:10,230 --> 00:25:16,740
OK, so this is one thousand three hundred ninety six point five, which is the exactly the number that

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00:25:16,740 --> 00:25:19,440
we have print income after health care reduction.

359
00:25:20,310 --> 00:25:23,280
So our calculation is correct in the printout.

360
00:25:23,490 --> 00:25:28,350
And OK, so we see here the printout all along the way.

361
00:25:28,590 --> 00:25:33,780
And you can see here we have a float number with lots of number after a decimal.

362
00:25:33,990 --> 00:25:34,840
And who doesn't?

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00:25:35,040 --> 00:25:35,970
We don't care about it.

364
00:25:36,130 --> 00:25:40,130
Like usually people don't use these numbers after a decimal point.

365
00:25:40,140 --> 00:25:46,050
We learn in the next videos how we can limit this to two numbers or three numbers doesn't matter.

366
00:25:46,380 --> 00:25:48,210
But for now, the correlation is good.

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00:25:49,200 --> 00:25:55,560
And once taking all of these numbers of taxes altogether, we have fewer taxes.

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00:25:55,920 --> 00:26:00,570
Print of total taxes, three thousand six hundred and seventy point forty five.

369
00:26:01,320 --> 00:26:04,590
This is the summary of all of these taxes right here.

370
00:26:05,490 --> 00:26:10,200
OK, so this is the code for all of these requirements right here.

371
00:26:10,410 --> 00:26:11,880
It's a bit challenging.

372
00:26:12,540 --> 00:26:19,730
All right, because you have lots of math here and percentage if you need some strengthening in percentage,

373
00:26:19,830 --> 00:26:25,130
go to Google and just learn quickly in 10 or 15 minutes how to use the percentage.

374
00:26:25,140 --> 00:26:31,200
It's not very difficult because if, for example, you want to know how much is five percent out of

375
00:26:31,200 --> 00:26:34,840
a number, you just multiplied by zero zero five.

376
00:26:34,910 --> 00:26:38,180
OK, if you want to know how much is 10 percent.

377
00:26:38,430 --> 00:26:43,230
So it's zero that one 15 percent, zero dollars 15.

378
00:26:43,560 --> 00:26:44,190
It's math.

379
00:26:44,190 --> 00:26:45,000
It's not programming.

380
00:26:45,000 --> 00:26:46,260
It's just simple math.

381
00:26:46,290 --> 00:26:53,400
OK, so, OK, this is a resolution for the practice part for for loops.

382
00:26:53,610 --> 00:26:56,550
I think that this sums up the four loops completely.

383
00:26:56,730 --> 00:26:59,670
And I think that now we are masters in full loops.

384
00:26:59,670 --> 00:27:07,740
If statements, variables, lists, lots of topics, I think we're done with about 70 percent of the

385
00:27:07,740 --> 00:27:14,820
pie out of the python course and and we're done with for loops in the next next videos.

386
00:27:14,820 --> 00:27:20,000
We're going to cover other loops as well, which are pretty much similar to follow.

387
00:27:20,050 --> 00:27:24,630
So if you understand for loops, the next videos will be pretty much easier for you.

388
00:27:25,680 --> 00:27:31,710
Just have some different characteristics with other with other loops.

389
00:27:31,920 --> 00:27:35,700
But it's pretty similar, pretty similar techniques for all four loops.

390
00:27:35,970 --> 00:27:41,350
Just the basic thing we're going around and around again and again in the loops.

391
00:27:41,370 --> 00:27:46,600
This is their purpose and I think we're done with this lecture.

392
00:27:47,010 --> 00:27:48,780
OK, great job, everyone.

393
00:27:49,020 --> 00:27:51,600
I will see you in the next video and bye bye.