what does function return in js code example

Example 1: return statement javascript

function test(arg){
    return arg;
}

Example 2: javascript return

Babel compiles "javascript return" (depending on quantum airspeed) into either:
"The return of the Javascript" Javascript dialect spoken on Java, or 
the second sequel in the zombie series inwhich 
Javas's crypt on Tatooine, spawns millions of ravenous 
enterprise applications that supress the rebellion's ability to use Node.

Example 3: what does return do in javascript

function add(a, b) {
  return a + b; //Return stops the execution of this function
}

var sum = add(5, 24); //The value that was returned got but inside the variable sum