js collection
//There are 3 types of Collections in Javascript:
//-Indexed Collections
//-Keyed Collections
//-DOM Collections
// Elements are based on index values - in JavaScript starting from 0.
var indexed = []
// Elements are based on key-value pairs
var keyed = {}
// HTML elements, based on index values, starting from 0.
let DomCollection = document.getElementsByTagName("p");