All language subtitles for 12. Functions Basics of function

I am one and welcome in this news with you in this video, we're going to talk about functions and more

precisely the basic function.

So a function is one of the most important thing in programmation and in Python function is like a variable.

You need to master it.

A function is very helpful when you have to do the same, could you have to apply a code?

But to me, multiple times, for example, if you want to compute the mean of a time series, but for.

1000 times there is you are not going to do a cookie past 1000.

Time to do exactly the same could, but with a little

modification.

So.

To fix this issue, you are going to use a function.

Let me show you a little example.

So to define a function you need to use to define oprah.com, then you put a space and you put the name

of your function, so may function and you open parenthesis, even if your function as no needed parameters.

And then you put the parameters of the input of the function, for example, in or example of compute,

the mean for many times there is the input will be the time series so param one person to person through.

Then you put double pane and you go to the name to the line and you need to have an indentation.

Then you can create for you function a dock, string a and doctrine is very important.

Why?

Because if you work with a very specific project and you create some function, you need to do a documentation

of your new function for you.

If you read the Quran again, but one year later, for example, and for other people which want to

see your code, for example.

So it's very important to tell what the function do, because if you have, for example, one hundred

function, it would be very impossible to understand all of the function without a documentation.

And then here we are good.

I'm not going to put a documentation because we create a very specific and easy function.

So this function?

Just

do the some of the three input.

And to use that function, it is very easy, so you just need to put the name of the function, the

parenthesis and the input that you want to give in the function.

And then in return, we have six because one two three is equal to six.

But sometimes it's very helpful to set default setting in our function.

So, for example, if I teach.

Dysfunction and for any reason, sometime I have just this parameter, and

if I want, I can set default parameter for the bond to end the Bond three.

It means that if.

I use this function, I can use it.

Putting the venue that I want for Bahrain to open three, but if I remove the venue of Pan £210 three

automatically, Biton put three for the bottom two and six for the prime three.

So if I run this, could we have one plus three?

So four plus six.

So 10.

So if I change this, we will have another result.

So it is important we need to understand the power of the function.

And for this video, I want to invite you to see it again and go under difficult for him to ask some

question about function.

If you are not comfortable with this notion.