Below is the example of the Array includes() method.
-
Example:
<script>varname = ['gfg','cse','geeks','portal'];a = name.includes('gfg')// Printing result of includes()document.write(a);</script> -
Output:
true
The array.includes() method is used to know either a particular element is present in the array or not and accordingly, it returns true or false i.e, if the element is present, then it returns true otherwise false.
Syntax:
array.includes(searchElement, start)
Parameter: This method accepts two parameters as mentioned above and described below:
- searchElement: This parameter holds the element which 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.
Below examples illustrate the Array includes() method in JavaScript:
-
Example 1: In this example the method will searched for the element 2 in that array.
Input : [1, 2, 3, 4, 5].includes(2); Output: true
-
Example 2: In this example the method will searched for the element 9 in that array.
Input : [1, 2, 3, 4, 5].includes(9); Output: false
Code for the above method is provided below:
Program 1:
<script> // Taking input as an array A
// having some elements.
var 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().
document.write(a);
</script> |
Output:
true
Program 2:
<script> // Taking input as an array A
// having some elements.
var 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()
document.write(a);
</script> |
Output:
false
Supported Browsers: The browsers supported by JavaScript Array includes() method are listed below:
- Google Chrome 47.0
- Microsoft Edge 14.0
- Mozilla Firefox 43.0
- Safari 9.0
- Opera 34.0
