02-Variables.js

var num = 1; //{1}
num = 3; //{2}

var price = 1.5; //{3}
var name = 'Packt'; //{4}
var trueValue = true; //{5}
var nullVar = null; //{6}
var und;  //7

console.log("num: "+ num);
console.log("name: "+ num);
console.log("trueValue: "+ num);
console.log("price: "+ num);
console.log("nullVar: "+ nullVar);
console.log("und: "+ und);