Array is a special type of object which contains ordered list of values.

Key of an array is indexed it starts from 0 and for each new element it keeps incrementing (0, 1, 2, 3, ......) it is defined by the JavaScript

Creating an Array

Empty object

let array = [];

Array of numbers

let numbers = [12, 45, 49, 53];

Array of strings

let fruits = ["Apple", "Banana", "Mango"];

Mixed Array

let mixed = ['Hello!', true, undefined, 21];

Example:

Declaration of an array

To declare an array you need to specify the array name with the elements in it.

let fruits = ["Apple", "Banana", "Mango"];

Accessing

fruits[0]

Adding

fruits [3] = "Watermelon"

Updating

fruits[1] = "Papaya"

Deleting

delete fruits[2]

Lenths:

Every array has special property called length which gives you the no. of elements in that array.