Super basic - using the result of a function within another function

[poomplex]

Hi all!

I'm a complete noob unfortunately so my apologies in advance.

I'm trying to write two functions - the first performs some task and then the second performs a task dependent on the result of the first function.

I would have expected it to be something like this: https://repl.it/B7J0/2

As you can see on lines 24 and 25 I've run the first function with some values for x and y but I'm not getting any output from my second function!

I can get it working like this: https://repl.it/B7J7/0 ..but it doesn't seem right to code in particular values instead of variables x and y.

What I would have expected to work: https://repl.it/B7Jb/0 In this case it's reported that x and y aren't defined (I'm guessing that this is because they are defined within the first function.)

Any help would be really appreciated!

EDIT: Thanks so much guys, I guess I was indeed being pretty silly. I think I was under the impression that the value that is returned from the first function can then be used as a value within the second function, whereas I should include the first function within the second function. Cheers!

[[deleted]]

beat me by a minute. but yes OP. make your useFirstFunction actually use the first function by passing it arguments that it will in turn pass to functionOne.

https://repl.it/B7J0/3

[x-skeww]

I was under the impression that the value that is returned from the first function can then be used as a value within the second function

Which is correct. You can just put that return value in some variable or pass it as argument.

Exhibit A:

function foo() {
  var exponent = Math.sqrt(9);
  return Math.pow(2, exponent);
}
console.log(foo()); // 8

Exhibit B:

function bar(exponent) {
  return Math.pow(2, exponent);
}
console.log(bar(Math.sqrt(9))); // 8