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

To copy the return value of any javascript, we can use inbuilt copy() method.

you can use any expression, function, etc find some examples below

1. using expresseion

a = 245; copy(a);

2. using function

a = function() {
  return "Hello world!"
}
copy(a());

Official Doc for reference