How to use a return value in another function in Javascript?

Question

I\'m self-teaching myself JavaScript and out of curiosity I\'m wondering what is the proper way of returning a value from one function to be used in another function. For ex

Answer 1

Call the function and save the return value of that very call.

function firstFunction() {
  // do something
  return "testing 123";
}

var test = firstFunction();  // this will grab you the return value from firstFunction();
alert(test);

You can make this call from another function too, as long as both functions have same scope.

For example:

function testCase() {
  var test = firstFunction(); 
  alert(test);
}

Demo