1//There are 3 types of Collections in Javascript:
2//-Indexed Collections
3//-Keyed Collections
4//-DOM Collections
5
6// Elements are based on index values - in JavaScript starting from 0.
7var indexed = [] 		
8// Elements are based on key-value pairs 
9var keyed = {} 		
10// HTML elements, based on index values, starting from 0.
11let DomCollection = document.getElementsByTagName("p");
12