I see a `var` that equals a `function` BEFORE that function is even defined. Wouldn't cause problems? If not, how come?

I think it's because a functional declaration, if done correctly as it seems this example is then it won't actually be read by the interpreter until if reaches functional call.

This the time the action declared vby the function is taken.

Hi Daniel. Thanks for I've looked online for 'hoisting' in javascript and that explains a lot. Thanks.

It's possible that this is explained in the previous video around the 6:30 mark.

Dave breaks down the process of the JS interpreter:

First, the JavaScript interpreter reads through the program. It memorizes the function and checks for any syntax errors.

Then it starts to run the program, it creates a variable named counter and stores the value zero in it.

It sounds like the JS interpreter stores functions into the browser's memory before the script is actually run or executed. Only functions, not other variables. I wasn't aware of this before, but it potentially helps me to understand how a framework like AngularJS uses all of the controllers and directives that you define.

But I don't know for sure - does this sound correct to anyone else?

I don't think i would become a problem unless the function was called before it was defined. meaning that you are just setting the value of a variable not actually executing the function which is later defined.

Don't quote me tho i could be wrong.

Jonathan and Chyno, thanks for answering! I understand what you're saying; but if line one defines the upper variable, and line two states randomNumber = getRandomNumber(upper) wouldn't this line be actually doing a function call to define the variable? Isn't getRandomNumber(upper) calling upon the function in order to define this variable?

I'm guessing that variables are not really interpreted until they are executed in code. In a similar fashion to what you guys mention about functions. So the variable is kind of 'indexed' but is not executed until the time when it's actually executed in code...

Thanks again for the feedback!

This example really has nothing to do with hoisting actually although that's an important concept to understand as well. The only reason why he could initiate a variable with a function that wasn't defined yet is because the variable wasn't used until AFTER the function was defined. That's it.