array: are a such a data structure(big container) that holds chunck of values that can be referenced later
we can call it from the 0, not from 1
Array is not primitive values, so it can be mutated and changed even with const variables.
Array can hold different types of value at the same time for example
const firstName = 'Sso';
const sso = [firstName, 'Sso', 2037 - 1992, 'Director', friends];
Add Element: push(), unshift()
returns the lenght of the new array
Remove Element: pop(),shift()
returns removed element
index return the index at which this element is located
includes new concept, gives true/false