# 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:
1. length
We use length to find length of the array 
```
console.log(arr2.length)
```
**OUTPUT:**
*5*
2. 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*
3. Slice:
Slice is a method that returns a selected element through a new array 
```
arr2.slice(1,3)
```
OUTPUT:
[23,45.6]
4. 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"]

5. 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"]
6. 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"]
6. unshift
```
arr2.unshift("python","javascript")
```
OUTPUT:
["python","javascript", 23, 45.6, "welcome"]
7. 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]

8. 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

10. 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
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