define_1.js

console.log(laterFunction);

var laterFunction = “Hey, define me later!”

// Output: Hey, define me later!

define_2.js

var laterFunction = "Hey, define me later!"

console.log(laterFunction);

// Output: Hey, define me later!

hoisting.js

(function() {
 radiohead(); // "I'll laugh until my head comes off"
 placebo(); // TypeError: placebo is not a function
  
 function radiohead () {
   console.log('I\'ll laugh until my head comes off');
 }
  
 var placebo = function () {
   console.log('You come on just like special K');
 }
}());

IIFE.js

var outputValue = 'placebo';

(function() {
 console.log(outputValue); // undefined
  
  var outputValue = 'radiohead';
}());