return in javacript code example

Example 1: jquery function return

function myFunction(p1, p2) {
  var a = "";
 $.post( "/url", function( data ) {a = data.result;});
  return a;
}

Example 2: 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