JavaScript Array includes() Method
The JavaScript Array includes() Method returns true if an array contains a specified value. The includes() method is case-sensitive.
Syntax:
array.includes(searchElement, start);
Parameters:
- searchElement: This parameter holds the element that will be searched.
- start: This parameter is optional and it holds the starting point of the array, where to begin the search the default value is 0.
Return Value:
It returns a Boolean value i.e., either True or False.
Example 1: In this example, we will see if a value is included in an array or not using the Array includes() method.
javascript
let name = ['gfg', 'cse', 'geeks', 'portal'];a = name.includes('gfg')// Printing result of includes()console.log(a); |
true
Example 2: In this example, the method will search for element 2 in that array.
javascript
// Taking input as an array A// having some elements.let A = [1, 2, 3, 4, 5];// includes() method is called to// test whether the searching element// is present in given array or not.a = A.includes(2)// Printing result of includes().console.log(a); |
true
Example 3: In this example, the method will search for the element ‘cat’ in that array and returns false as ‘cat’ is not present in the array.
javascript
// Taking input as an array A// having some elements.let name = ['gfg', 'cse', 'geeks', 'portal'];// includes() method is called to// test whether the searching element// is present in given array or not.a = name.includes('cat')// Printing result of includes()console.log(a); |
false
We have a complete list of Javascript Array methods, to check those please go through this Javascript Array Complete referencearticle.
Supported Browsers:
- Google Chrome 47.0
- Microsoft Edge 14.0
- Mozilla Firefox 43.0
- Safari 9.0
- Opera 34.0
We have a Cheat Sheet on Javascript where we covered all the important topics of Javascript to check those please go through Javascript Cheat Sheet-A Basic guide to JavaScript.
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