Array Methods in JavaScript

 //Array Methods

let num = [1, 2, 3, 34, 4];

let b = num.toString();

console.log(b, typeof b);

let c = num.join("_");

console.log(c, typeof c);

let d = num.join(" and ");

console.log(d, typeof d);

let r = num.pop();  //pop returns the popped element

console.log(num, r);

let r2 = num.push(56);  //push returns the new array length

console.log(num, r2);

let r3 = num.shift();   //shift() Removes first element and returns it

console.log(r3, num);   //Removes an element from the start of the array

let r4 = num.unshift(78); //unshift() Adds element to the beginning.Returns new Array length

console.log(r4, num);

OUTPUT :

1,2,3,34,4 string 1_2_3_34_4 string 1 and 2 and 3 and 34 and 4 string [ 1, 2, 3, 34 ] 4 [ 1, 2, 3, 34, 56 ] 5 1 [ 2, 3, 34, 56 ] 5 [ 78, 2, 3, 34, 56 ]