var vs let const javascript code example
Example 1: const let var scope
var num = 1; //var can be function or global scoped
const num = 2; //const can only be block scoped
let num = 3; //let can only be block scoped
Example 2: var or const in javascript
// var declares a variable, meaning its value will vary.
// const declares a constant, meaning its value will remain
// consistant and not change.
// If your variable changes throughout the program or website,
// declare it using a var statement.
// Otherwise, if its value does not change, declare it using
// a const statement.
const myConst='A const does not change.';
var myVar='A var does change.';
var myVar=2;