Arrays in Javascript are a variable that allows storing a collection of multiple items. Ex:- const fruits=["apple","banana","kiwi"];

Accesing arrays

const fruits=["apple","banana","kiwi"];
let fruit=fruits[0]
console.log(fruit) //apple

Changing an array element

const fruits=["apple","banana","kiwi"];
fruits[0]="grapes";
console.log(fruits);

The length property

const fruits=["apple","banana","kiwi"];
console.log(fruits.length);
//3

Adding array elements using push()

const fruits=["apple","banana","kiwi"];
fruits.push("orange");
console.log(fruits);
//apple,banana,kiwi,orange

Removing array elements using pop()

const fruits=["apple","banana","kiwi","orange"];
fruits.pop();
console.log(fruits);
//apple,banana,kiwi

shift() method

It removes the first element of an array and shifts other elements to the left.
const fruits=["apple","banana","kiwi,"orange"];
fruits.shift();
console.log(fruits);
//"banana","kiwi","orange"

unshift() method

The unshift method adds new elements to the beginning of an array.

const fruits=["apple","banana","kiwi,"orange"];
fruits.unshift("mango");
console.log(fruits);
//"mango","apple","banana","kiwi","orange"

concat() method:-

The concat method is used to concatenate or merge two or more arrays.

const arr1=["apple","banana","kiwi"];
const arr2=["Honda","Toyota"];
console.log(arr1.concat(arr2));
//"apple","banana","kiwi","Honda","Toyota".