All language subtitles for 020 Do While Loop__en

Welcome back.

And this video we are going to look at do while loops and while loops are very similar to the wire loops

and they just differ in a small detail or small difference, which means that they don't check before

they execute at least once.

So what does that even mean?

Well, let's have a look at this.

Let's say we have this variable again, this variable X and.

Let's say we start at 1:00 and then we do the following, so we do.

And we only do a while, but we do this once, all right, so I'm just going to write down the syntax

before we do anything else.

So I'm going to use this ax again.

Actually, let me set that to one here.

It was 100 here.

So let's leave it like this.

All right.

So we have this variable X and then we have this Dukey word, curly brackets, and then we have this

wild keyword in those curly brackets.

It's important that we get to a situation where this wild statement is not true at one point anymore

and it's done by incrementing X in our case.

So in this case, the do while loop will be run 10 times and will go from one to 10.

So let's print something here.

I'm just going to print X here, so nothing too fancy again, and I'm just going to say print do while

loop is done so that we are it says de Waal, who has done this.

Scroll up one, two, three, four, five and so forth, and then two while loop is done.

So how is that different to the wire loop?

Well, the difference is that let's say our X is not one, but it's 15.

Then this condition is not true because 15 is not less or equal.

10, it's higher than 10.

But the court will still be executed at least once.

Let's just see what that really means and how that looks like.

And there we are.

It says 15 and while it was done so it printed 15, but it didn't do the rest of the iteration, so

it didn't run 10 times or however many times.

It really just ran once because the condition is not met, but still it ran once.

And that's something that is really important sometimes.

So when would you use a do?

While instead of a while?

Well, there are multiple applications, but let's say you want to run an execution on multiple users

of a list, but you need to get that list from a server.

So what you would do is you would try to establish the connection to the server and only as long as

the connection to the server works.

You want to print the names of that list or you want to work through that list.

And that's something that you would do first and then you could check, OK, is the connection established?

And if it's established, then run through the list or do the execution.

Of course, there are multiple more applications for this, but we will see throughout the course when

it makes sense to use to while.

So I'd say let's just check out for loops in the next video to see the third type of loop, which is

very similar to a wire loop.

So see their.