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OK.

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So it's time again for a few quick javascript function exercises.

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So like the first few problem sets I'm not going to have you actually write code just yet.

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I'm just going to give you a function here and a little bit of code and I'd like for you to evaluate

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what happens when I run this code.

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So go ahead.

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Pause the video and then we'll talk about what actually happens in just a few moments.

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So in this code we're declaring a function called test and it takes two arguments x and y and then all

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that it does is a returned Y which is the second argument minus X which is the first.

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So when I called test here with 10 and 40 X is going to be 10 y is going to be 40.

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So we end up with a return 40 minus 10 which should return 30.

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So let's verify that by opening up the cancel and pasting the code in.

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And you can see we get 30 great.

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OK.

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So we have one more here.

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This is another function also called test like for you to pause the video and evaluate what happens

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when we run this code.

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OK so this function test takes a single argument x and then it returned X times 2 and then it looks

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like it also confidant logs X and then it returns X divided by two.

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But if you'll remember from the video on the return key word as soon as we return something execution

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of a function stops.

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So when we return x times 2 the function is over.

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And so neither of these lines actually runs.

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So test 40 is going to return 80 and then that's it.

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So to verify that open up the con..

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Paste this in and you can see we get 80 but we never get counted out log 40 or return 20