Array in Javascript | Arrays Properties and Method

What is an Array?

In JavaScript, An Array is a data structure that contains a list of elements. These elements are of the same data types. Such as integer or string.

Syntax:

let arrayname=[ ];

let arrayname=new();

Example:

let car=["BMW","Merc"];

Using  keyword new:

syntax:

let arrayname=new Array();

Example:

let car=new Array("BMW","Merc");

Access the Elements from Array:

We can access the array element by their index 

Example:

let a=car[0];

console.log(a);

Properties of Array:

There are some properties of an Arrays in Javascript

1.lenght

2.Prototype

Methods of Array:

1.concat() : it used to concat tow arrays.

2.find(): it is used to find an element in an Array.

3.filter(): Creates a new array with every element in an array that passes a test.

4.isArray(): Checks whether an object is an array.

5.Pop(): Delete the Array Element.

6.Push(): Insert the array element.

7.sort(): Sort Array list.

8.reverse(): to reverse the array.

Example:

let a=[1,2,3,4];
let b=new Array(2,3,7,8);
console.log(a);
console.log(b);
console.log("Lenth of Array a is",a.length);//property of Array
let c=a.concat(b);
console.log("Concat",c);
a.push(7);
console.log("After Push",a)
console.log(a.reverse())
console.log(a.sort())

Output:

(4) [1, 2, 3, 4]
Lenth of Array a is 4
Concat (8) [1, 2, 3, 4, 2, 3, 7, 8]
After Push (5) [1, 2, 3, 4, 7]
(5) [7, 4, 3, 2, 1]
(5) [1, 2, 3, 4, 7]