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Welcome back, ladies and gentlemen.

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Today, we're going to talk about JavaScript comparison operators.

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We already started doing this at the end of the last lecture, but we're going to continue today.

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Now, first things first.

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Did you finish your exercises?

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So lecture one exercise.

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So if you haven't, just find that file in the final folder in do doodle, do those exercise is going

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to help you.

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And if you don't know how to do them, then just open these solution solutions, file for the same lecture

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and yeah, you will have the solutions.

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OK, now before I start, we the operators and by the way, these are the ones that we are going to

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cover today.

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We did some of them, these four.

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But yeah, we're going to talk about a little bit more in these we will do in future because I kind

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of show you we haven't done very well yet.

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So let's open here now before doing the comparison operators, remember, I've just said that we have

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external file and we linking that file into the index, that HTML we'd calling this creep attack.

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Now we need to specify the type and the source.

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These SIRC stands for source.

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We just defined the source and that is in the same directory as the index HTML file.

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OK, that's pretty much clear, but this is called external Cyesis file.

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So the other way is we can run.

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A JavaScript code here in the console, right in the browser now the third way, it's very simple,

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we can actually run JavaScript here.

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So what I all need to do is open the script and close that script and put type here even without typing

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will work.

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Text SportWagen JavaScript.

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Now, here we are going to run, I mean, not run, we are going to type our JavaScript code, for example,

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was the most simple one.

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So hello from here.

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Now save it.

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Let's open up.

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And why you don't see the output?

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Well, because it's here.

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It's in first line and why it's in the first line, because these JavaScript will run before the external

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file.

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Right, if we put it back.

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This, then it will be on the last line, nice, so I'm not going to use in line and I'm not going to

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use the browser much, but definitely I will use the external files.

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And today we're going to create a new file called Lecture two that J is.

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Now, what I haven't told you is that J is now these dodgiest genius stands for JavaScript and it's

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called extension.

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And this extension will tell.

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Yeah, we are going to write a JavaScript code like this HTML saying, OK, this will be contained on

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HTML markup.

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Nice.

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So we create a cover.

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A lot of things that we haven't done in the previous lecture.

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Now if you don't see these icons that I have here, you can do you can search this code.

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There are different packages, icons like that.

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And this is the one that I have.

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So you can install it.

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I already have it.

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And yeah, it will change your icons like mine, but you can find different icons like this.

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Look, this is even nicer, you know what, I'm going to install it.

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Pendle see here is now set fire like a. good.

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And didn't change anything, probably needs to restart, it doesn't matter.

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OK, now you know how to install.

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I come back, right.

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But you're also going to work because if you haven't done before, yeah, it will pretty much work.

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OK, so we create the second lecture to not just file, but now here we need to common this one.

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So so select the entire line, command forward slash iMac or control forward slash in Windows and save

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it.

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But now I don't have links to any of the files, but I do want to link the my second file.

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Right, because now if I go here it will be empty.

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We don't have anybody here.

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And let's write console that log.

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In, say, Java script comparison.

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All parade tourists.

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If I misspelled something, don't please don't judge me.

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Now, if you click here, it will just make the full window right now.

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This No one means that I haven't save it, cuz now you know all those things about the Eskild, some

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teaching and things that I shouldn't.

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I'm sorry.

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And now let's start with the comparison operator.

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So first things first.

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I'm just going to write console that log five is greater than five.

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OK, Rod, console the log another one.

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And let's put a breathing space here.

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Let's copy this one here.

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Let's create a one comment.

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So the comments are two double forward slash, but we can make a multiple line comments and that's forward

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slash.

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Star, and we need to close this one star forward slash, so anything between these two, it's going

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to be considered as a common multi line comment.

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Now you know how to do a multiline comments as well.

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Nice.

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So save this one.

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Go back to five smaller than six.

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Nice.

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So what we do have I'm going to read it more scenarios and we're going to discuss about this.

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So greater or equal to.

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And you know what?

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Just to make sure that you have a breathing space between to be just more readable.

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Right.

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OK, it's not going to throw you in there, don't worry about it, so this will be greater than than

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we need to do five less than let's make it five less than fire.

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And that's it.

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Let's stop here.

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OK, save it.

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Now we have false.

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True, true, true.

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Oh, well, five is not greater than five and it's always going to return a boolean value called false.

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Right now the second one six is a greater than five.

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Yes, that's true.

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And the third one, what we are doing, we are seeing if is five greater or equal to five.

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So because it's not greater but is equal to and that's why it give us true.

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Now the other one is five is smaller, equal to five.

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And it's not smaller, but it's equal to.

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And that's why again, it's giving us true.

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Now what is about this operator?

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Have you seen something like this?

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Well, if it's your first time JavaScript that you haven't, probably five is equal, equal to five.

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Now, this is something interesting.

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So what this will do, it will throw true here.

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Right.

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Let's make something here.

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Let's make here for just to make sure that we have false yeah, do you know where we are?

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So we have false then that this one is true.

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So this equal equal to means equal value in equal type.

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So checking the value five is the same as this.

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And he's also checking the type and the type is a number and also both are true.

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So that is equal.

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But what about cancel that log.

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Five, equal to five.

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Do you think what will happen here now, we're not going to talk about this, it's called Inverleith

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left hand side assignment.

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Now we haven't done variables, but equals in JavaScript means assign.

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For example, if I have here variable call X, then I will say, OK, to this variable X give assign

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a value of five.

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Right.

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That's why I'm not going to cover.

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And I told you that we are going to do them in future.

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Actually I don't have.

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Yeah, probably I'm going to do the future so.

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Yep.

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That will be.

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So it's not working like that.

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That's why I don't talk now, the next one very interesting is that log six.

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Is not equal to five, make sure you understand what I'm trying to do here, not equal do five anything

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in JavaScript, you see exclamation mark, it will make that one to to be opposite of that one.

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Right.

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So this one means equal, but this means not in JavaScript.

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So it will make it the opposite.

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Now, this will mean not equal.

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And not not equal type.

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And not equal value.

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OK, so it may not equal time and not equal value.

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Good.

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So what, you think this will happen?

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So obviously here we have the same type.

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The type is a correct in six is not equal to five.

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Well, that should be true because six is not equal to five.

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And we have the same numbers.

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Same type of numbers.

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Right.

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OK, let's do one more.

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I mean, with the same operator six not equal to six, would you think this will happen?

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So we saying that this is a from a type number and it's not equal to.

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Six, well, that's not true.

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Six is equal to six, right?

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So here we can compare it to something else.

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And it will say true, why will say true?

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Well, six is not equal to something, something is a string.

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And first things first.

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This will check if the time is a number.

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So six is a number, string is not string.

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This one is string.

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So it's not a number.

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So it's not equal time.

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So the first parameter is not satisfied.

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And again, six is not even equal to something.

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Right.

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The value is different.

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OK, that is pretty much it.

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Well, I can leave that one there.

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Don't worry about it.

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So you know about the comparison operators and we will talk more about them, the rest of them.

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Oops.

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In future.

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So stay safe and I will see you in the next one.