Call Stack

function multiply(x, y) {
    return x * y;
}
 
function printSquare(x) {
    var s = multiply(x, x);
    console.log(s);
}
 
printSquare(5);

function foo(b) {
  var a = 5;
  return a * b + 10;
}
 
function bar(x) {
  var y = 3;
  return foo(x * y);
}
 
console.log(bar(6));

const sec = 3000;
 
function callMe() {
  setTimeout(function timeout() {
    console.log('hi');
    foo();
  }, sec);
}
 
function foo() {
  setTimeout(function timeout() {
    bar();
    console.log('solomon!!');
  }, sec);
}
 
function bar() {
  setTimeout(function timeout() {
    console.log('juchan!!');
  }, sec);
}
 
callMe();
/*
visualize code
 
(http://latentflip.com/loupe/?code=Y29uc3Qgc2VjID0gNDAwMDsKCmZ1bmN0aW9uIGNhbGxGaXJzdCgpIHsKICBzZXRUaW1lb3V0KGZ1bmN0aW9uIHRpbWVvdXQoKSB7CiAgICBjb25zb2xlLmxvZygnaGknKTsKICAgIGNhbGxTZWNvbmQoKTsKICB9LCBzZWMpOwp9CgpmdW5jdGlvbiBjYWxsU2Vjb25kKCkgewogIHNldFRpbWVvdXQoZnVuY3Rpb24gdGltZW91dCgpIHsKICAgIGNvbnNvbGUubG9nKCdteSBuYW1lIGlzJyk7CiAgICBjYWxsVGhpcmQoKTsKICB9LCBzZWMpOwp9CgpmdW5jdGlvbiBjYWxsVGhpcmQoKSB7CiAgc2V0VGltZW91dChmdW5jdGlvbiB0aW1lb3V0KCkgewogICAgY29uc29sZS5sb2coJ2p1Y2hhbiEhJyk7CiAgfSwgc2VjKTsKfQoKY2FsbEZpcnN0KCk7Cg%3D%3D!!!PGJ1dHRvbj5DbGljayBtZSE8L2J1dHRvbj4%3D)
*/

function first() {
	setTimeout(function timeout() {
  	console.log("The First function has been called.")
  }, 1000)
}
 
function second() {
	setTimeout(function timeout() {
  	console.log("The Second function has been called.")
  }, 999)
}
 
first();
second();

for (var i = 0; i < 5; i++) {
  setTimeout(function timeout() {
    console.log(i)
  }, 0)
}
//결과 값?