Loops: Break and Continue

Quick reference

• 00:01 Okay, in this video, I want to talk about breaking and
• 00:05 continuing in and out of loops.
• 00:08 So you've got a loop, it's looping around, it's doing its thing.
• 00:11 You may want to break out of that loop before the loop actually in.
• 00:16 So you know in our past videos, we started at 10 and went down to 1,
• 00:19 it ends when we hit 1, right?
• 00:21 Well, maybe we want to end when it hits 5, even though it should keep going.
• 00:26 Or maybe we want to do something else when it hits 5 and
• 00:29 continue on after the normal 5.
• 00:32 So you can do either one by breaking or continuing and
• 00:34 that's what we're going to look at in this video.
• 00:36 So let's create a quick while loop.
• 00:37 So let's create an integer, let's call it x, let's set it = to, I don't know,
• 00:41 8, whatever.
• 00:42 We don't have to start it 1 or 0, or 10 or anything, you start anything you want for
• 00:47 your counter.
• 00:48 And let's go while and say x is greater than or
• 00:52 equal to 1, we want to do something.
• 00:55 And what we want to do, let's cConsole.WriteLine and
• 01:00 let's just print out x, right?
• 01:03 And let's say x- -, so we're starting at 8, we want to go down.
• 01:07 So if we save this and run it, we know what's going to happen.
• 01:14 We started 8, 7, 6, 5, 4, 3, 2, 1.
• 01:15 Well, what if we want to break when we're halfway through, or a certain way through?
• 01:21 Well, we could do that.
• 01:23 We can add a condition inside of here.
• 01:26 So let's go if x = 4, let's just say, then we want to break.
• 01:32 So let's save this and run it, see what happens.
• 01:39 So now we get 8, 7, 6, 5, we hit 4, it breaks, it stops.
• 01:44 It should have kept going 3, 2, 1, but no, no, we told it, hey, stop at 4.
• 01:48 I don't know why you would want to do that but you can and it's just that easy.
• 01:53 We can break out of here.
• 01:55 We can also continue, all right?
• 01:56 What is this going to do?
• 01:58 Well, this is going to sort of skip a step, right?
• 02:02 If x = 4, it's saying start with the next loop again,
• 02:06 don't do anything for 4, keep going after that.
• 02:11 So here we can go if x = 4 and let's create some brackets,
• 02:16 let's increment or decrement our counter and then say continue.
• 02:22 We'll save this and run it.
• 02:26 Now, we get at 8, 7, 6, 5, 4 isn't there, 3,
• 02:31 2, 1, we've essentially skipped 4 and then continued on after it, right?
• 02:38 And that's how you do that.
• 02:40 So breaking continue very easy.
• 02:41 We can do these same exact things with our for loop.
• 02:45 So, we created a quick for loop, we could say for int i =, let's say started at 10.
• 02:50 We want to say i greater than or equal to 1, and then let's i --.
• 02:58 Decrement this guy.
• 03:00 Here, we can Console.WriteLine out our i,
• 03:05 and we've got an extra bracket here.
• 03:10 All right, so if we save this and run it, we know this is just going to go to 10, 9,
• 03:14 8, 7, 6, 5, 4, 3, 2,1.
• 03:16 Again, if we want to break out of here, inside of here,
• 03:23 we could go if i = 4, then you know we want to break.
• 03:29 Save this, run it.
• 03:31 Same thing, 10,9, 8, 7, 6, 5, it hits 4, we break, right?
• 03:34 Same thing with continue.
• 03:38 We can add our scrolly brackets and we can say continue.
• 03:45 Same thing here, save it, run it.
• 03:47 And notice we don't have to add our increment or decrement inside
• 03:51 here since this is a for loop, I get 10, 9, 8, 7, 6, 5, 4 disappears.
• 03:55 We continue after 4, 3, 2, 1.

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