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Hey, welcome to the Discord experiment.

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In this video, we're going to run two experiments on the match case block and one experiment on the

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for loop.

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Let's first start with the first experiment.

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All the match case block.

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So when we run this program as a user, we are expected to enter either add, show or exit.

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But what happens if we enter something else, like a random piece of text?

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If you press enter, the program will ask you again to type in add, show or exit.

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So my question to you here is what happens after we entered this random string?

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Which of these code blocks was executed?

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The one under ads.

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The one on the show or the one on the exit?

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The answer is none of them was executed.

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What happened is that all these lines were ignored because the case was not matched and therefore the

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loop went again back to.

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The first line.

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So the wild loop was executed again.

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And that's why we get this text printed out.

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So that is the result of this line being executed.

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Now, what if we wanted to show something, some other text when the user enters some text which doesn't

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match any of these cases?

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Well, in that case, you should add another case.

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Here.

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And instead of matching the random string, you want to place a variable such as X or whatever.

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It just has to be a variable and you don't need to define it anywhere in the code.

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So this variable will be defined on the fly.

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So you see Case X or whatever variable.

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And under this perhaps you want to print a message such as Hey, you enter an unknown command.

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So if I try the script now run and I enter a random string again, press enter.

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This time we get this printed out.

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So as you can see, this time this code was executed because the case was matched with that anonymous

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variable as a conventional view.

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Instead of using whatever variable name here, it's good to use just an underscore.

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So this name is like a convention to have among programmers so that you know what you mean when you

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have this code.

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So it's good to use that underscore even though you don't have to.

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And so that was the first experiment.

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So this is what you can do if you want to execute some lines when none of the cases is matched.

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We're not going to implement this in the program.

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So I'm going to delete that.

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It was just to show you that that is also possible.

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And the second experiment is.

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Let's go to case show and make a space, then type in.

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A vertical bar symbol on your keyboard.

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You can type this in using alt seven or shift backslash.

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Perhaps it depends on your keyboard.

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Or maybe you can find this on Google and copy and paste it in your ID, and after this I'll write another

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string display.

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If I run this code and I add a to do so, I press on, add press and clean press enter.

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And then instead of show, I can also write this play here.

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And if I press enter, I'll get a list of to items.

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So this is a bitwise or operator.

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So this will match either show or display.

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So if one of these strings is matched, then this is evaluated to true.

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So these lines will be executed.

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All right.

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That was the second experiment.

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Let me delete that as well.

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If you want, you can keep it.

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But I don't want to have lots of code here.

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I don't want to add any possible feature to this program because that will make my code complex.

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And that means it can be hard for you to see what I'm typing in and what time explaining.

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So it's better to keep the program simple but functional so that you understand the new concepts.

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The third experiment I want to focus on for Loop this time, and I just want to make sure that you know

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that you can add more lines under the for loop line.

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So under the first line, for example, you can say item is equal to item dot title.

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So we get the two items, each item, each string to do list, and we convert the characters, the first

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characters of those words into title case, and then we print out the results.

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So we reassign this variable.

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Let's see what this will bring us.

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So run and clean the bag at Throw the trash.

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Press enter show Now Show will display the to the items with the first letter of each word capitalized.

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So see is capitalized t as well and so on.

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And that is made possible by this title method.

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So my point with this experiment is that under this line you can have as many lines as you want, but

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be aware that they should be all indented in the same indentation level.

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So that means four spaces for each of these lines under the fourth line.

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And that was the last experiment.

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So I hope this gives you some more understanding of the match case.

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BLOCK And the for loop.

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I'm glad to still have you in the course.

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So let's keep going.

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See?