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It isn't.

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Welcome back to another class of our course about Python.

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So in the best class we talk mostly about strings how strings works and well what are strings.

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And in today's class we are going to talk about another type of data which are numbers.

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So my goal today is to show you how works.

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Numbers what exactly we can do with numbers on pythons.

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And we are going to talk about some basic by ton functions and how to use them will also integrate the

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numbers with the strings since we did sell how to do it in our best class.

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All right.

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So let's begin.

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So before we start you guys need to understand that in Python to have access to well to all the math

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functions you need to write a simple line of code.

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So this will give you access to all math functions.

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So simply write down from math import and you write down this little star when it's all done you are

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able to write down all the math functions that you want.

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And trust me in Python you have hundreds of different math functions.

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And my goal here is simply to show you what to give you an introduction to all of this.

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So let's start.

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All right.

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So you have different type of numbers that exist well in everyday life as well.

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So you have complete numbers let's say forty five is a complete numbers.

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No you have negative numbers.

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So minus five forty forty five and you have the numbers with the commas in this case twenty six point

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three to one.

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So those are the numbers that we will work with in Python.

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So the first thing that we are going to do is make basic calculations.

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So in this case we are going to talk about addition multiplication division and subtraction.

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So how all this works.

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Very simple.

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So if you started the same way you write down print you open up your parentheses and let's say you want

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to do 10 plus then you simply write it down like this and you can run your code as you can see the answer

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is 20.

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So Python gives you 20 as an answer.

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Same thing if for example you do 10 plus 10 multiplied by three.

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So what school with python is that it will respect the priority of operations.

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So it's like a calculator for example you do 10 plus 10.

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In this case it's not gonna do 20 multiplied by treats going to multiply three by 10 at first then do

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plus 10.

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So this will return us 40 which makes sense.

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But let's say for example I want to do 10 plus 10 at first.

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So I'll simply need to enter my vertices and then I run my app.

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So as you can see my answer is 60.

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All right.

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Right now let's say I have more than one operation.

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So I have all those operations I have additions that have multiplication I have division and I have

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let's say subtraction.

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So all this very important.

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If you don't have the right amount of parentheses.

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Python was simply not to run up.

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So very important to have the right amount of parentheses as you can see right here is the answer to

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my calculation.

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So as I explained python is really a huge well it's also can be used as a huge calculator and you have

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access to all the mathematical formulas in it.

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All right.

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So this is to understand how to make basic calculations in Python.

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Next thing that we will before we continue.

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Just give you a small difference between numbers and strings and the way you'll write it down.

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So let's say you want to print a number so you will simply write down.

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Well let's say when the print is trying so you will write down print open up your your commas and let's

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say you want to write down a word.

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So just a word you'll print it and it's going to return you word if you want to print a number.

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You don't have to write down those those those commas right here.

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You just can write down your number in this case let's say it's 20.

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202 as you can see right here you have your number which is two hundred and two if you write down those

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commas.

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It's gonna work as well but the only thing is it will not be a number.

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And if it's not a number well it will simply not work as a calculation so let's say I want to add this

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with the 20.

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So it will not work because in this case you are trying to make an addition of a number with a string.

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So it's normal that it's not working even if this will give you the same answer as this as you can see

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it gives you the exact same thing.

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But this is a string.

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This is in number.

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So with this you can't work you can make additions abstraction and everything.

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And then with this it will work.

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All right.

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Let's say right now we have a string.

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So in this case let's say we have print.

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We have our.

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Well we have our sentence.

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So we have a small sentence which will be in this case.

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Hello.

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My age is twenty five.

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So I have my sentence.

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Just put it.

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Perfect.

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Right now let's say I want to work with my twenty five let's say when I store my twenty five into a

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variable which is called age and we will store twenty five and this variable and then what I want to

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do I want to integrate my age right here let's say I write down each

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so in this case it's gonna look something like this

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so what I just did.

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I have my text here and I added age but since it's a string and a number we'll have a year right here.

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It doesn't work.

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So how you can modify this.

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It's very simple.

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First of all you can transform your variable right here which is a number into string.

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So let's say I want to transform it into a string.

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In this case it will work.

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But let's say I want to keep it.

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I want to keep this as a number because I want to make calculations or whatever I want to do with it.

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So how I will do this is very simple.

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I will simply add that I will simply work with a function.

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In this case this will be a function that will transform my age into my age which is a number into a

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string.

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So in this case I will simply write down a star.

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So as the bar will be this function and I simply close my burnt is when it's done.

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So when we play our app it works.

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So it gives us Hello my name my age is and in this case it's twenty five.

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So you can see it works perfectly.

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So this is a good way if you guys want to work with let's say a string if you want to work with strings

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and numbers let's say for example and make calculations here.

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It's gonna be twenty five plus then and in this case my age is thirty five.

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So here I have two numbers that works together and I transform them into a string here.

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So I'll be able to work with the strings and with a number that I transform in a string as well.

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So right now you understand how this works.

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So this.

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Those are the basics.

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Next thing that we are going to talk about will be functions that you guys can use with numbers.

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So let's say for example you have a small database of numbers.

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So let's say I would print I have 1 5 6 2 9 4 30 so I have all those numbers.

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And from all those numbers I want to find out which is the highest number.

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So what exactly I will use I will use a function I can use a function that will help me find out which

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is the highest number with between all those numbers.

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In this case is gonna be the max function.

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So I just select all my numbers right here and I click on run my app.

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And in this case the number that is generated is 30.

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I can't have any type of numbers right here.

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I can have.

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Well I can have numbers that are negative numbers.

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I can have positive numbers.

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I can have any any type of numbers.

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It will still work.

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All right.

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So this is for the max function.

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This is a good way.

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If you guys have a database of numbers and you want to find out the highest number or does well the

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highest number with the max function next function we are going to talk about will be the main function

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which is how to find out the smallest number possible in this case it is the main function.

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So as I said the main function we want to do right now is simply write down men instead of writing Max

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and you run your app because you can see here your smart your smallest number is minus 1.

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So even if your numbers are very complicated so let's say you have zero point 2 1 3 6 and any other

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type of numbers it will always find out the smallest number between all those numbers.

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In this case it doesn't work because here we go right now.

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Right.

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So you can see you will always find out the smallest number between all those numbers.

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So right now you understand how to find out the biggest and the smallest number.

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Let's say you want to do a more complex calculation that integrates let's say making calculating power

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power so let's say you want to do equal.

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So print

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five and you want five and that 5 Power 2.

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So in this case is gonna give you twenty five.

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So how do you calculate this.

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It's very simple you have a function that will calculate the let's say well the.

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In this case the power.

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And in this case it will be.

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Well this is the power so instead of doing this and this and you run it and it doesn't work if you want

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to make this calculation it's going to be a function that will do it.

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It's that power function.

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And how do you calculate this.

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It's a very simple the first number that you will have that you want is let's say five and you want

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five in a power of two so you will multiply five by five.

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So here we go.

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We have our five and want to multiply five by five.

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We run our function as you can see it give us twenty five as an answer.

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Once again we can make our other calculations so let's say fifty five divided by thirty six plus the

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power of five by you two.

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And we run the app and as you can see gives us the answer and the answer makes sense.

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All right.

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So right now we know how to calculate all this.

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Let's say we want to add another function to our calculation.

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We want this number as a complete number.

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So we want it.

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In this case we want let's say instead of having twenty six point four four four four four we want to

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have 26.

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So how exactly we'll do this.

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Once again it's very very simple.

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We'll simply add a round.

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So there is another function.

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So we will be able to calculate well not to calculate but simply to generate that the number which is

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the closest number to well the closest complete number.

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So in this case 26 will be the closest complete number.

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So it's very simple.

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It will be the round function

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and you can run everything.

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So it give us 26.

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So let me just explain what we just wrote.

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We ask.

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Excel Excel so we ask Python to run this calculation and to give us the round value well we ask Python

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to print the round value of this calculation.

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In this case we ask by down to print us the complete and only the complete number of this calculation.

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In this case it's 26.

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So if let's say for example right now we want if we have let's say in negative numbers or we'll just

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write down minus all this and we'll run our calculations.

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So as you can see our answer will beat minus 26 and let's say right now we want to have a positive number.

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So we still want our twenty six.

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We still want to have 26 but we have minus 26.

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So how do we do this.

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It's very simple.

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We have another function in Python that is called the D A B A B S which will calculate the absolute

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value of a certain number which in this case will be the absolute value of minus 26.

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So how do we do this simply write down a b s open up your parentheses and you can close them and we

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will run our calculation and as you can see you have 26.

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Let me just give you a small demo.

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What is the IBS function.

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So let's say you have minus 20 and that you want to print.

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You want to have the absolute value of minus 20.

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It will simply give you the absolute value of minus 20.

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And let's say you print it.

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So as you can see here you have 20 which is the absolute value of minus 20.

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Right here you will roll down a a bit complicated math calculation.

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But once again it's not.

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Well when we go step by step it's not that hard to understand.

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Right now what we asked White on to do we asked Python to print the absolute value of minus the round

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value of this calculation.

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In this case as you can see it integrates all the functions that we want together.

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Let's say right now we calculated the power of something but let's say we want the square root of something.

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So in this case we simply will write down print s q far T and the one the square root of twenty five

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is gonna be five.

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As you can see it's down here so we'll just delete the first part of our calculation so once again this

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is another math the math thing that you can do on Python as I explained you can do absolutely anything

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on Python that you can do on the calculator.

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All right.

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So let's talk about some more advanced math functions that you can have on Python.

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Once again you have hundreds of them.

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But some variable some that are very very important very important but some that are commonly used in

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just some basic ones that I found out on the Internet and that I think will be interesting to show you

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guys that you can have on Python.

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And if you want to have some others that you want to use you can just go on Google and write down Python

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math functions you'll have well hundreds of them.

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So let me just show you some basics that exists on well that you can use.

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So the first one will be sale.

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This function is very simple it will return you the smallest integrate integral value greater than the

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number.

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So let's say for example I write don't sell off in this case twenty three point nine nine nine nine

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nine and I run it.

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So it's gonna be twenty four.

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But if I write down twenty three point 0 0 as a resume one it's gonna be twenty four as well because

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we return well in this case the highest value after twenty three even if it's twenty three and an infinity

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of zeros we will return 24 twelve not an infinity of zeros let's say enough zeros because if it's an

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infinity it's gonna be too much close to twenty three.

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All right.

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So the next question is if let's say want to do the reverse of the sale function in this case we want

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to return the greatest value.

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So in this the first case it was the smallest value.

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And in the next one to return the greatest value.

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So it's gonna be the floor function.

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So instead of sale we'll write down the floor.

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So as you can see returns twenty three even if the answer.

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Well even if our basic number is twenty three point 9 9 9 9 9 as you can see returns twenty three.

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Another way to calculate Well we have the absolute value if we want to calculate the factorial of something

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there'll be another well that'll be the last function that we'll see today.

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The factory all of a function is simply a number and you multiply all the smallest numbers of this number

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by.

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Until you reach this number.

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So let's say for example 5 the 5 defector you'll call de facto real value of 5 will be 1 multiplied

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by 2 multiplied by three by four by five which indifference of the absolute value will be simply minus

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stand will equal to ten.

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All right so let's calculate the factorial of something in this case we will simply write down print

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we open up our parentheses and write down factorial and let's say we want.

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We don't want a big number at first let's say we just want the number three in this case the answer

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will simply be six because we did 1 multiplied by 2 multiplied by 3.

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But let's say we have a huge number which will be let's say one hundred which is really really huge

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for rules.

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Well in this case it will generate us the answer as you can see the answer is huge because with it one

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multiplied by two by three by four until one hundred and we have our answer right here the more the

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number is huge the more the calculation is going to take time.

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I'm not going to make the allegation for a huge number.

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I don't want my Python to bug but if you guys want want to try it at home you can do it just don't write

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down two huge numbers because your computer will just freeze.

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So this is for you.

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This is for the numbers part.

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So until now we saw all the not well we we talked about all different types of numbers.

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We talked about the how to make basic calculations and by time we talked how to work with strings and

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numbers and how to store both of them together.

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So you should be able to do it on your own right now we talked about some basic math functions.

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Once again if you are interested to find some other math functions you have simply go on Google and

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write down Python math functions and you can have hundreds of them once again.

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I just use those as an example because I wrote down Python math functions and I was able to.

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Those were the most popular and I just showed them as an example.

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But once again if you want more advanced math functions you can find them at the end of the day is how

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you use them.

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It's and it's not about the functions but it's how you use them and what exactly you make with them.

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All right.

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So until now you understand what our strings and what are our numbers.

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So for this course.

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That's it.

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And see you all in our next class.