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OK, here we are back in VS code, so let's work up an example.

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So in this example, we're going through a menu and we're ordering something off the menu.

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So at the end, we want to check with the user and make sure that they don't want to order something

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extra.

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So we'll say something like,

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let's prompt or not prompt.

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What answer equals prompt on?

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What size price?

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Would you like.

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And I've got the team take to work very well, and then down here will say, yes, answer equals small,

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we'll say

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I'm going to do this all night in the council.

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So we'll say answer equals I will say confirm this time.

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Confirm small is not very much.

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Are you sure?

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And if answer is true, will go on otherwise then we'll ask them what size would you like that.

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So absolutely false in this case.

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We'll say not answer.

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And by the way, I should be using a triple equals sign up here to check the type as well.

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So we'll say, if not, answer.

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We'll say answer equals prompt,

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would we go confirm?

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Would you like large?

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And then we'll say, let's see here will say, well, credit variables say a lot of fry size of the

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Y equals zero, where zero means they don't want any fries, one too small to medium and three is large.

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And so then we'll say, would you like large?

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They do want a large B three.

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Otherwise it's going to be two because the only choice is medium.

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So we'll say if you answer.

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And then we'll say fry size equals three

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else, fry size equals two, and then the all the way back here where we didn't confirm this, it's

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always better to have a positive answer or positive checks are going to change this to true.

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And all this down here will make into a fall or into an else.

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So if they are sure they want small, we'll make the prices be three, I'm sorry, one.

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And then also I will say we won't bother to ask them if they say medium or if they say large, we'll

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just assume that that's OK.

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So we'll say, oh, if answer equals medium.

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Frame size equals to.

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Else, what would you say else, there's no other choices else prices equals three.

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And then down here at the bottom, we'll just toss up an alert.

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And we'll deal with the templating your price size is.

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Process.

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All right, so we got a little program here that does a couple of things.

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So let's go ahead and run it and.

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So what size fries would you like?

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So let's just say a large quick, OK, tossed out there, your fries houses three.

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Let's run it again.

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We say medium.

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It says your price rises, too.

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If we say small, small is not very much.

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Are you sure?

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We will say cancel means not sure in this case.

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Would you like a large number or a large difference sizes too.

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So you can see a confirm is a little bit a little bit difficult on that as far as the prompt.

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Can you change the prompt?

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I don't remember now.

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It doesn't look like.

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All right, so we've got this little thing in here where we're checking the prices and it can be small,

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medium or large.

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Now, there's a little problem here, which is that if you don't type in the answer.

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Exactly, it's going to give you well, it's probably going to give you large.

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So if I say I want small without an uppercase, yes, it's going to fall all the way through to the

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house and say, hey, you wanted a large which is maybe not what the user wanted it.

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Right.

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So we can build in a little bit more better air checking into this, too.

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So they only give the answer that that they're supposed to give.

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So let's do that a little bit differently and say, what size fries would you like?

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And we'll give them more limited choices of what they can enter.

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So we'll say as equals more

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and equals medium now equals large.

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All right.

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So we're going to have them enter the S, M or L instead.

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So let's change this to S, let's change this to M and let's go ahead and change this.

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So we do the check.

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The answer equals L.

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All right, so let's try that and see what happens.

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What size, Farai, would you like as equal, small and medium, Alekos, large, yes.

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Your friend has a zero because if all the way through and it didn't find anything, so there are no

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fries.

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So our first problem is that our answers equals an uppercase value.

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So one way we can handle this is by using an R so we can say or

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answer equals a little less

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and then think that here.

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But I'm not going to change it for right now.

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Right now, I find a little less that's going to go into the small logic.

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Are you sure?

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OK, Fry says one we order a large.

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OK, another way to handle this would be with a switch statement instead of these ifs.

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The problem with a bunch of this when you have different cases is it starts getting complicated.

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Switch statement will make it a little bit simpler so you can do any switch statement with ifs.

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But switch statement is better if you have a certain set of answers that you're going to get.

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So we'll say switch

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answer.

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And then here we'll say case.

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Yes,

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case a little less.

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And when you get a curly brace.

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And we get down in the end of this and we say break and then down here case and.

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Case little in and we get rid of this stuff and we also want to get rid of this extra curly brace and

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we'll get rid of this stuff and at the end of this Christmas break,

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and then instead of this, we want to say.

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Case, Al.

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Case a little while and at the end of this, we want to say break and then we going say default.

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No fries ordered,

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and then we ended up with the curly fries.

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Now a lot of times Vaskov will organize your coat for you when you finalize a curly brace, but it did

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do it in this case.

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So I'm going to give you a shortcut to reorganize all your code so you lose you hold down the control

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key.

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This is on Windows.

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It might be different on a Macintosh or Linux, but you do control a which is to select all and then

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control still holding down the control k f and reformats your code.

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So now everything is indented correctly.

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So here we have a case statement that does this.

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So that's kind of nice.

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So let's save that and let's run.

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It was a surprise.

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Would you like to say a little as small as.

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Not very much.

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Are you sure.

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I say cancel and it says, would you like large?

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Why is it asking me would you like large?

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Oh, oh, because I said that I don't want the small, so we'll say, OK, your price has just three,

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that's fine.

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So this solves it, but we can make it even a little bit simpler.

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If we said, if you recall correctly, on the two string, there's a two on the on the string, there's

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a two upper second say to upper case.

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So we we change the diaper case so we can get rid of the little the little characters.

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And that makes our program a little bit simpler.

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So all we have is S, M and L and no fries ordered.

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So it should work exactly the same

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medium and taking a lower case m different sizes too.

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OK, let's thing, let's use the ternary operator to handle the the size down here.

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So we're going to embed a couple of things and we'll do it as a separate statement.

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We'll say let's bring in a conflict because we're not going to change it.

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Costed Fahri size name equals.

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So the price size is one, it's large.

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So we'll say fry size properly equals one then large and then we could say else something else.

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But we need to check if it's two or three and we also need to check on the zero.

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So this can be sort of the complicated ternary.

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So let's just start with this and say if it's one that is large, otherwise it's medium and that's not

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right.

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But we'll make it more complicated in just a second.

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So we'll say you are a large Frazetta three, and that's because I did not put the price his name in

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here.

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So if assizes million, let's say I've got it backwards, largest three.

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Let's try one more time

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right now.

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If ISIS is like anything else better, it's can be media.

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So fighter.

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Q Let's just say, I guess the president, because it goes the alert first and then once he's done with

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that, it says your privatizes media.

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All right.

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So one thing we can do since we get this alert here, if we don't get a good process, is we can say

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if Fahri size is greater than or equal to one and Frys size is less than or equal to three.

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So that way we won't get a double message on that.

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And again, you can see it in dance.

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So I'm just going to do the control AK and it will reorganize everything.

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So now we're only doing this for the large and medium.

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So on the medium side, what we'll do is go down to a new line.

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Why do that?

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I'd like to indent so on.

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The new line will say if the fray size equals to that, it's a medium, otherwise small.

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And when you start doing this with the ternary operator, it's probably better put parentheses around

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their here so it doesn't mistake you.

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Don't make a mistake on what you're doing now with it only gets grouped together.

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All right.

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Is that right?

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How the world will say to you, why are we getting no prize or because I said to get my own rules,

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I am different sizes, medium sized again and small.

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Are you sure?

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OK, for our size as small as brown one more time or small.

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Are you sure?

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No.

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We like a large size is large.

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And again, if we enter a bad entry like, you know, fries ordered and it's not going to give us the

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second message this time.

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So anyway, that is an introduction to the conditionals using relational operators and logical operators,

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and that really helps build out our programming examples.