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So what I'm going to do now basically is to resolve the homework and we're going to try and do it together.

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I'll just open the project, as we did in last lectures and this window.

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All right.

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And.

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That's great, Hugh.

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A new file called.

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Variables, homework.

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I'm just going to mention a small quick note.

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All right, once you create classes or in other words, a module and become, you have to start with

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the capital letter.

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We already discussed it in the previous lecture.

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But if you have several words, just stick them all together.

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And each and every word will start with a capital case, meaning capital letter at the beginning of

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every war that you have.

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All right.

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So the headline will be like this string variables, homework, practice.

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Right.

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And the first assignment was to create a sorry guys windows serial number variable that each value will

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be A, B, C, D, E, F, G, H, I and J, k, l.

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Great.

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So let's just mention that this is part one.

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Create a simple variable.

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With the following values.

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All right, so let's head up to the second part, which is part two, and we talked about using the

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index and ranges to take part of the original string.

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Correct.

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So let's try to do it.

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Let's just do let's just do give the first the names new partial.

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You can give any name you want.

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As long as it is.

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As long as who reads it can understand what your meaning here, as long as it's a meaningful name.

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All right.

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So it's very important to give meaningful names.

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So I'm just going to create four of these and just change the last letter here to indicate the difference

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between them.

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And right now, as I just mentioned in the hint, we're going to use we're going to just take the original

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a variable.

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Right.

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You see, it's you have a pop up of to completion here from just hit enter whoopsie again and then square

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brackets.

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And I'm just going to take the zero to three values and this will basically give me A, B, C.

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Correct.

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So I want to do the same thing and just copying it with control C and control V to based.

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Basting a three year and here I'm going to take four to seven.

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All right, so just a quick reminder, we're starting the count from zero.

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So this is one to zero count.

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This one is one and this one is two.

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And this one is three.

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Wow.

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Three is not counted.

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We talked about it in the previous lecture that you have the range here and the last number is not counted.

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So basically you take from zero to three without the three.

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So we have zero to three without the three zero one and two.

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And then we want to skip the minus and start off from force of this one is four, five and six.

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All right, and this one is seven, so we have four to seven without the seven, same as the same as

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we did in as we did in here.

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All right.

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And so on and so on.

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So here it will be a 211.

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And here it's going to be a 12 to 15.

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And now this just for verification, let's just try to print them, all right, we print the first one.

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I'm always going to mention the small tips, even if it's annoying.

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Guys, for those of you that don't remember, I still once you try typing, you have this pop up and

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you have all the options, you don't need to manually type everything.

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So, for example, now I want you to print the new partial variable B, so I have it right here.

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I just hit enter boom.

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So it's you.

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And now I'm going to do it for C and I'm going to do it for.

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D..

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All right, so for now, let's just try to verify that what we did here in part two is correct.

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All right, so great, we have what we wanted.

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We have ABCDE, Faggotry and Jayco and exactly what we wanted.

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All right, so we broke down the four parts of this year number exactly like and we wanted to do in

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part two.

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And let's head up for part three.

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So in part, were you what we were needed to do is to.

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Replace values with new ones.

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Using replace.

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All right, so this is the name of the action that we have studied in the previous lecture.

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Oh, I missed here the number.

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And capital.

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All right, so let's just do let's just take the the variables ABCDE all right.

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From here, I'll just copy copy them manually.

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So we have a.

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Now we have the.

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S..

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And so because, you know, I'm copying them altogether, because it's the same action up on each and

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every one of them.

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00:07:12,680 --> 00:07:17,510
So once we figure out how to do it, the first one, always the same thing for the other ones as well.

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So what we want to do actually, guys, is to replace the the values.

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So how do we do it?

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It's really easy.

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Think of it as a logically, we just take the existing value.

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All right.

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00:07:33,470 --> 00:07:36,950
We take the existing this one and this one are the same.

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Right.

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00:07:37,910 --> 00:07:40,830
But here we declared a new variable.

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This is one is a new variable is same is in math that you write, for example.

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This is just an example, right?

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Same as in math that you write like X is five plus three.

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All right.

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So you declare a variable.

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And you put a value to it, so the left side is always a declaration and the right side is always the

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value that you put inside the variable.

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This is very important.

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All right.

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You can get your life really easy regarding these street variables.

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So this is the variable that I have.

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And now on the right side, I'm going to put the value to it.

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So what value do I wanted to put in it?

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So I'm just going to hit it that they replace.

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And then as I recall, we needed to take the ABC.

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Right, because this is what we have in new partial variable and replace it with AAA.

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Right.

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And we wanted to do the same with the second one.

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Let's just choose B here.

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Don't be.

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And that's replace and single quote and then.

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Replace the DSF with baby.

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Oh, I've missed the single quote, maybe be all right.

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Thirty one new partial C that's in place, then we have GHC.

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And right after the coma and quoting Mark, we have a coma and then another clotting and C.C.C. and

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the last one knew partial these dots place and we want to replace the J.

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K l.

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Coma with the the the correct just to verify the step, let's let us just print it again.

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So.

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So, guys, the program runs from top to bottom.

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OK, so here we declared the new partial a variable here we printed it, but here we declared a new

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value to it.

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So once once the program runs from top to bottom and it got to this point right here.

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So we have inserted a new value into a new partial variable, new partial variable.

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A has a new value now.

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So the print over here is going to print ABC, but once we print again here.

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He's going to print AAA because this line indicates that new partial variable A has a new value inside

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it.

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So it's going to print AAA according to what we wrote here.

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All right.

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So so I'm just going to copy all of these.

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All right.

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Because it's the same command, the same variables, but different values to the variable.

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So it's very important.

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All right.

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So let us just verify it and.

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Right.

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Click and run.

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00:11:10,210 --> 00:11:17,950
All right, so we have A, B, C, D, E, F, G, G, Chai and Jakiel from the previous from like a

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step two part to and from part three, we have AAA, BBB, CCC and DVD.

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00:11:25,930 --> 00:11:28,750
This is exactly what we wanted to achieve.

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We use here the replace action and we replaced the current value inside it with what we wanted right

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here on the right side.

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00:11:39,640 --> 00:11:43,630
So we're down to part four.

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And in part four, we wanted to create a new serial number.

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Out of the new.

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But sorry, partial partial ones.

155
00:12:03,150 --> 00:12:05,040
All right, we wanted to take.

156
00:12:05,280 --> 00:12:10,050
Sorry, guys, we wanted to take these four variables and we wanted to create a new one.

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So we were asked to call the variable and encoded.

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Windows serial number.

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00:12:22,350 --> 00:12:27,360
And how can we actually combine these four?

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It's really simple.

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00:12:30,370 --> 00:12:38,230
We'll just take the first one and then use plus so it's not a mathematical action, we're not going

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00:12:38,230 --> 00:12:49,060
to combine AAA and plus BBB, it's not going to give a mathematical result because this plus sign is

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upon a string.

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00:12:50,440 --> 00:12:50,790
All right.

165
00:12:50,800 --> 00:12:53,230
Well, we're dealing with string values here.

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All right.

167
00:12:54,580 --> 00:12:56,430
We're dealing with string values here.

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00:12:56,710 --> 00:13:05,380
So this action will actually just stick them together because you can't really do a plus sign upon letters

169
00:13:05,620 --> 00:13:13,390
or it doesn't matter if even if you had, like, numbers here, you can do a plus plus assign upon string

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values because it's not possible.

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00:13:15,670 --> 00:13:17,820
So this is just going to stick them together.

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So I'm just going to double click the new partial variable B and control V to base it here.

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00:13:25,690 --> 00:13:35,840
Another plus control C to copy control V and another plus and print it.

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00:13:36,520 --> 00:13:40,810
So let's just print it and just copy it.

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Double click control.

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See.

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And print, enter and control V to paste it as just right, click and run.

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00:13:54,350 --> 00:14:00,020
All right, so we have the serial number right here, but we have a slight problem because the original

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the original serial number had like minus signs between them.

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00:14:04,220 --> 00:14:07,020
And we've been over this in the previous lectures.

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So what we're going to do is just insert another plus here.

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00:14:14,180 --> 00:14:14,580
All right.

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We have a look.

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00:14:15,620 --> 00:14:18,530
I just wanted you to go into the details.

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00:14:18,720 --> 00:14:20,320
We have the first one right here.

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00:14:20,480 --> 00:14:22,060
We had the second one right here.

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00:14:22,190 --> 00:14:24,030
And between then, we have a plus.

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00:14:24,260 --> 00:14:32,810
So what we want to do is to add another plus here and then add quoting Marx and then add a space between

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00:14:32,810 --> 00:14:33,140
them.

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00:14:33,450 --> 00:14:35,870
And actually, we don't need a space.

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00:14:35,870 --> 00:14:41,480
We need a minus sign between them because we want the new serial number to look like this with a minus

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00:14:41,480 --> 00:14:42,920
sign between each part.

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00:14:44,240 --> 00:14:50,420
So what we got here, we have the first part and then we have a plus with a minus and then we have the

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00:14:50,420 --> 00:14:51,670
second part and so on.

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00:14:51,950 --> 00:14:54,750
So let's do it here as well.

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00:14:54,950 --> 00:14:55,610
Plus.

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00:14:57,510 --> 00:15:06,090
Quoting Marks and minus and here as well, plus quoting Marx and Mind and minus, so right, click on

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00:15:06,090 --> 00:15:07,470
the file and run it.

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00:15:08,310 --> 00:15:10,410
Whoa, guys, you see it.

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00:15:10,420 --> 00:15:12,330
We have exactly what we wanted.

201
00:15:12,870 --> 00:15:15,000
And Part five was.

202
00:15:17,870 --> 00:15:20,360
Print the serial number.

203
00:15:21,310 --> 00:15:33,310
Along with plain text, so this one is pretty easy, just add the quoting marks and state and encoded

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00:15:33,310 --> 00:15:34,750
serial number.

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00:15:35,970 --> 00:15:45,870
Ahead and then another space and after the quoting marks, just add the plus sign and take this very

206
00:15:46,110 --> 00:15:52,050
this final variable that we have copied and pasted here and let's print it.

207
00:15:54,650 --> 00:15:59,860
So there we have it, we have the final serial number that we wanted after we manipulated it.

208
00:16:00,110 --> 00:16:02,190
So let's have a quick look what we did here.

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00:16:02,420 --> 00:16:10,940
We've taken a base serial on the serial number, and afterwards we first declared variables A, B,

210
00:16:10,940 --> 00:16:12,650
C and D, partial ones.

211
00:16:13,100 --> 00:16:15,950
And we've put these values inside them.

212
00:16:15,950 --> 00:16:24,190
We've taken the original serial number and we have just extracted values zero to three into it.

213
00:16:24,440 --> 00:16:30,320
And same here a and here just printed it afterwards for verification.

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00:16:30,890 --> 00:16:34,520
Then we've taken these four variables right here.

215
00:16:34,520 --> 00:16:38,690
We declare them again and we have changed the value which is inside them.

216
00:16:38,870 --> 00:16:46,520
We've taken the same value and we applied to replace action upon them, change the value inside from

217
00:16:46,520 --> 00:16:49,630
this value to that one and the same for all of them.

218
00:16:50,630 --> 00:16:54,740
Then we printed it quickly to see what we have inside, just to verify it.

219
00:16:55,520 --> 00:17:03,200
Afterwards, we combine the four parts altogether and added a minus sign between them in order for the

220
00:17:03,200 --> 00:17:05,120
new serial number to look like this.

221
00:17:06,740 --> 00:17:14,500
And the last part was just to add plain text here and afterwards sprint the new serial number.

222
00:17:15,260 --> 00:17:18,990
So guys, we finish to practice string variables.

223
00:17:19,160 --> 00:17:20,370
This was amazing.

224
00:17:20,390 --> 00:17:26,560
I think dominant dominating the string variable if we got until this part.

225
00:17:27,170 --> 00:17:34,180
Don't be scared if it wasn't very easy for you because it was indeed a challenging assignment.

226
00:17:34,550 --> 00:17:38,120
So I just want you to understand what we have done.

227
00:17:38,390 --> 00:17:42,080
And this is the important part to understand what we are doing.

228
00:17:42,380 --> 00:17:47,840
And even if you didn't do everything by yourself, even if you did some parts, it's all right.

229
00:17:48,050 --> 00:17:50,060
We're in a learning process.

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00:17:50,210 --> 00:17:55,370
And don't worry, we're going to practice the shrink variables and again and again in the future as

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00:17:55,370 --> 00:17:55,730
well.

232
00:17:56,460 --> 00:18:04,250
And I recommend that after this lesson, the homework lesson, just try to play with these variables.

233
00:18:04,250 --> 00:18:07,490
Just for example, just for I'm just just an example.

234
00:18:08,210 --> 00:18:15,670
Just changes from AAA to AA and just printed again just like that.

235
00:18:15,680 --> 00:18:15,980
Right.

236
00:18:16,000 --> 00:18:22,850
So, for example, we have printed the V.A. We see it here and afterwards we can see it also in here.

237
00:18:23,930 --> 00:18:28,070
Just do some do some tricks on the cold, as you can see right here.

238
00:18:28,400 --> 00:18:34,700
And also this file is attached to the lecture, so you can just copy it.

239
00:18:34,700 --> 00:18:36,080
It's a plain text file.

240
00:18:36,320 --> 00:18:39,050
You can just copy it into your polytrauma and use it.

241
00:18:39,350 --> 00:18:46,070
And just don't be afraid to change values here and just to get the hang of it deeper as much as you

242
00:18:46,070 --> 00:18:46,400
can.

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All right, guys, thank you.

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And I will see you in the next lecture.