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Welcome back everybody.

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All right.

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So let's take a quick look at why the variable is in the function and why it is not inside the function.

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OK.

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So if we go ahead and meet we just copy or cut this out.

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And paste it here.

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And you can see that if we type in 23 or even you know anything like awesome like this it doesn't work

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and you're thinking well why is that.

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Well first of all there's this idea of something called scope K and it has to do with these brackets

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here and I'm just going to return that on this and just like that so we can see as a little bit better.

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So what it is is that if we were to have let's say another function here.

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OK if I just type in function you know fun k and i type in you know another thing here.

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All of these variables here can be used in both of these functions and for the most part there would

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be what we call quote unquote global variables meaning that you can see each of these variables within

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these functions here.

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K so variable number you can use it here you can use it here you can use it anywhere.

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When you put it inside a curly bracket at any given time it doesn't matter if it's a function or another

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kind of computer programming tool that we need.

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For example a for loop if we put a variable inside there that means you can't see it out there so change

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text variable is not able to see this outside here.

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Now the reason why it works in here and the reason why it doesn't work out here is because this document

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does get Elmont ID can only be used in a function.

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That's why it doesn't really work because it doesn't javascript doesn't necessarily see that as a viable

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command outside the functions.

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So remember the functions is where most of your computer programming is going to be gay and scope is

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really really important because at least when you're typing code like this what ends up happening is

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that you have different levels of scope.

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Now if you take in any one of my other courses for example the non-program courses for example Harmac

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ask the programming how many games though programming they several fathers down quite a bit.

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And this is a topic that beginner programmers tend to really struggle with is where you can see variables

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and where you can't see variables.

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So again if it's outside the function you can see them within every function.

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But if it's inside the function you can only see that within functions here.

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Now right now there's only two levels.

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There's a global which is these up here and a local which is in the function.

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And again there could be more.

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So it's better to think of these as just these two two kinds of variables.

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At this point in time.

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All right see you guys in next tutorial.