Variables

• Name of storage locn where data is stored
• case-sensitive
• begin with a letter, _ or $
• can contain letters, numberes, underscore or $
• can't belong to reserved keywords

Const

const pi='trains'; // An Invariable Variable, Block Scoped

var

• mutable

var a = 5; // Function Scoped

let

• mutable

let there = "Be Peace"; //Block Scoped