Array in javascript

In this article, we will be discussing arrays in javascript and their methods.

In simple words, an array is a collection of different items or different datatype stored under a common name Array in javascript is literally an easy way to create an array array with the different items :

let arr = ["java","HTML","python","javascript","CSS"]

Array with different datatype

let arr2 = ["hello",23,45.6,true,'h']

Javascript Array methods:

length We use length to find length of the array
```
console.log(arr2.length)
```
OUTPUT: 5
Indexing If we wanted to access the array we can access it through the name like arr2 but, if we wanted to access the individual element from it for that we use indexing NOTE : Indexing starts from 0 arr2[3] OUTPUT: true
Slice: Slice is a method that returns a selected element through a new array
```
arr2.slice(1,3)
```
OUTPUT: [23,45.6]
splice Splice is a method wich adds new value in a given specific index or replaces the value with the existing element arr2.splice(index,1|2,"some value") 1- adding element 2- replacing the with existing element
```
arr2.splice(3,1,"welcome")
```
OUTPUT: ["hello", 23, 45.6, "welcome", "h"]
pop Pop is a method that is used to remove the last element from the existing array
```
arr2.pop()
```
OUTPUT: ["hello", 23, 45.6, "welcome"]
Shift: The shift is used to remove the element at the front from the exiting element This is just like the pop but the pop will removes last element from it , but shift will remove the front element from the array

arr2.shift()

OUTPUT: [23, 45.6, "welcome"]

unshift
```
arr2.unshift("python","javascript")
```
OUTPUT: ["python","javascript", 23, 45.6, "welcome"]
concat Concat is a method that is used to concatenate two array
```
let array1 = ["python","javascript","HTML","CSS"]
let array2 = [12,33,56,34,67]
console.log(array1.concat(array2)
```
OUTPUT: ["python","javascript","HTML","CSS",12,33,56,34,67]
includes It is a method that checks the index and the element we provided and returns a boolean value

array2.includes(value,index)
array1.includes(12,"HTML")

OUTPUT: true

9.indexof This is an method which provide index of the element

console.log(arr1.indexOf("HTML"));

OUTPUT: 2

toString This is an method that convert array into string
```
console.log(array1.toString());
```
OUTPUT: "python","javascript","HTML","CSS",12,33,56,34,67

THANK YOU EVERY ONE HAVE A NICE DAY

Karka Vishwanath Reddy's Blog

Karka Vishwanath Reddy's Blog

Array in javascript