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Hello, my precious students.

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And in this lecture, we will see some live, quote, examples regarding methods we we have learned

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in the previous video what our methods, methods, BASIX basically, and we have seen method that does

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not receive a very well.

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And we have also seen an example of a method that does receive a variable.

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So let's see some examples.

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And once you open your project, create methods.

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Live examples file.

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All right.

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And here also.

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And right here, I just want to create a quick method, if you remember, there was a special special

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word, special word key that indicates that we're dealing with a method and that word is def.

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Right.

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And then just create a new new method and you could call a salary salary calculation.

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Just want to pay to get your intention to the following thing or in the beginning of the course, I

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mentioned that we're going to discuss and we're going to focus on coding conventions.

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Coding conventions is basically some agreed rules between all developers, and there are rules for each

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each programming language separately.

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So in Python, we also have coding conventions, meaning some accepted rules among developers worldwide,

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which are dictated by the company that invented Python, basically.

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So it's not that every person can invent its own his own rules.

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So the conventions regarding variables we we have already discussed and basically these rules apply

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upon methods as well.

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So basically methods and variables have the same rules regarding coding conventions, coding conventions.

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Basically, what is

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relevant to this point is the naming of the naming.

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This is like the big name of coding conventions goes down to the naming.

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OK, so at this point, if you create methods so first of all, start the name of the method with small

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letters and if you have more than one word in the naming.

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So just separate them with another score.

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So it's a very important rule to keep in order to stay professional and not to make fool of ourselves,

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of ourselves once you get to job interviews and so on.

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All right.

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So this is our method called salary calculations.

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And in here, I'm going to do a salary of the employee and it will be consist of salary variable multiplied

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by 098.

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Basically I reducing if I'm getting some kind of salary, I'm reducing two percent out of the whole

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salary.

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Once I multiplied in zero dark 98 and you can address this number as taxes for example.

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All right.

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It doesn't really have any meaning just for the practice.

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All right.

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So you can see right here we have the calculation and at the end, I just want to print it.

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And the salary is.

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Is the salary of the employee all right, so this is our method, OK, right here and this is our methods

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content.

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And basically we're missing one thing, which is this variable salary.

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And as we've seen in the previous lecture, we first to in order for this method to be called or executed,

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we need we need to execute it outside of the method itself.

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So as long as they have intention, as long as I have like spaces here inside the method and right now

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I'm going to press back but make space and now again at the beginning of the line here.

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So that means that I'm outside of the method content.

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I'm outside of this whole method thing.

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And right now I'm just going to execute it.

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And how they do it, basically, I just mention the method and also I want to pass some variable into

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it.

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I want to pass a salary variable.

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And as you as you can guess, it's not a string variable because I'm not going to multiply a word upon

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a number.

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It's not logical.

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So obviously, this number should be in some kind of number.

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And I want to pass it from here.

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This is point A and this is going to be point B and this is going to be point C, so you can check out

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the previous lecture.

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I discussed it in the last part there, that once we put the variable over here in the in the execution

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part, this is the first point which the variable is inserted.

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Then it goes up to the top to the methods declaration and from there it goes inside the method itself.

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So if a board, for example, 1000 or maybe 10000 like this.

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All right.

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So right here it's back.

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It has good brownish background because it's unexpected.

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And why is it unexpected?

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Because I didn't put it over here as well.

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And here in the math, a declaration declaration of the variable should be the same, as I mentioned

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it inside the method candidate content because they need to identify one another.

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OK, so I'm just going to put salary here as well.

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All right.

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And now we're good.

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OK, so I've sat here 10000 thousand then I'm just executing this method, meaning this one.

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And I've said ten thousand here.

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So basically here it's going to be equals to ten thousand at this point.

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This does American here ABCDs as long as here inside, they also are going to have the same thing.

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OK, then it's correct.

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It doesn't matter what I put here, as long as it's the same thing that I have inside the methods content.

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Right.

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So I'm just going to put something meaningful here.

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Also, this is one of the parts that our convention is very important.

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Just to say, just to state your full names for variables.

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I've seen lots of unexperienced programmers that put variables such as this cell, meaning it's short

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of salary, but this is no good because I know if I wrote it, I know this the short of salary, what

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someone else can come tomorrow on the on for for a year from now and read it.

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And he will not understand what what he says.

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All right.

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He will not understand maybe from this reference right here, he can understand a salary ESL stance

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for salary, but doesn't matter just you want to make easy life for your co-workers that work with you.

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OK, so one of the main rules of professional programming is to put full names and not short names for

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variables.

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All right.

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Like this.

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So let's run this for for a second and see what we have.

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All right.

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So the salary is ninety eight hundred, as we expected from this print right here.

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But look at this line if I want to put some other number here, OK, so I don't need to create an additional

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method, OK, because this is just a variable.

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This is a variable.

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I can I can execute this method again with a different variable so I can make a separate line, remove

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the brackets here.

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I can create a separate line and put 5000 here.

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OK, you see the beauty of it.

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So I'm using this bulk of code as many times as I want in the code.

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Just created it once and then I can execute it how many times I want.

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Let's run it again.

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You see the printout here, so I used it twice and I can use it a million times from now and I don't

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need to create the calculation.

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This part again and again for each variable that I've set here, don't need to do it.

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Just do it once.

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And that's it.

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All right.

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So this is the whole idea of this method, method, trick.

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This is very important for object oriented programming.

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Our next topic.

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So it's a very useful and very meaningful part in programming in general.

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All right.

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I also just want to show you a new trick that we haven't started yet.

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We can put several variables here.

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So if I put, for example, the multiplication number or maybe like tax reduction.

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OK, so I could put two variables here inside the method declaration as long as I put here also two

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numbers as well.

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And then just I'm going to remove this one.

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OK, ok then 098 just put two variables here.

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OK, then he asks me to put two as well and these two as well.

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You see, you see here when a hover parameter tax reduction on field.

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So it demands me to put it demands me to put two variables and now it's more dynamic because now I can

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put one time the tax reduction to be 098 in a different time.

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For example.

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It's a different country.

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I can put different tax.

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So it's very flexible and you see the beauty of it because you can put you whatever you want.

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So once I have here 098 this called hardcoded, this is the term hardcoded variable hardcoded means

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that you can't change it.

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It stays still forever.

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The same number, but now it's not hardcoded.

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Now it's advanced and it's dynamic.

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OK, so each time I owe, each time I execute this method, I can put different variables for tax reduction

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and different variables for salary.

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Let's see how it goes.

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Let's run it.

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OK, we have some kind of problem here.

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Of course, I don't have a comma.

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All right, OK.

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So everything's fine, so we put the celery here and we put the tax reduction over here.

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Great.

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So this summer's off the basic part of math.

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You can see it's very simple.

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You can put one variable here or even two variables here as long as you put also two variables in the

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execution line.

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And also it can execute it as many times as you want, each time with different variables inside the

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method.

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So it's a very flexible and you can see why it's very important in programming.

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All right.

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That sums up this lecture I will see in the next one.

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Thank you.

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Wemba by.