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Welcome back.

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

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

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they execute at least once.

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So what does that even mean?

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Well, let's have a look at this.

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

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

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

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before we do anything else.

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So I'm going to use this ax again.

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Actually, let me set that to one here.

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It was 100 here.

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So let's leave it like this.

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All right.

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

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wild keyword in those curly brackets.

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

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

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

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So let's print something here.

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

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

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

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So how is that different to the wire loop?

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

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

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10, it's higher than 10.

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But the court will still be executed at least once.

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

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And there we are.

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

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

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

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And that's something that is really important sometimes.

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So when would you use a do?

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While instead of a while?

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

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

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

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the connection to the server works.

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

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

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

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

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it makes sense to use to while.

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

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very similar to a wire loop.

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So see their.