Console + Variables

1. You can always log to the console

JavaScript

console.log(2 + 2);

4

2. Variables "hold" values

JavaScript

var myMessage = 'Hello there, world!";
console.log(myMessage);

Hello there, world!

3. If a variable holds a number you can do algebra

JavaScript

var cats = 3;
var dogs = 4;
var fish = 8;
var pets = cats + fish + dogs;
console.log(pets);

15