JavaScript | array.includes() function

The array.includes() is an inbuilt function in JavaScript which 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)

Parameter:
searchElement: It is the element which is searched.
Return Value:
It return a Boolean value i.e, either True or False.

Examples:



Input:
[1, 2, 3, 4, 5].includes(2);
Output:
true
Input:
[1, 2, 3, 4, 5].includes(9);
Output:
false

JavaScript code to show working of array.includes() function:
Code #1:

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<script>
  
    // Taking input as an array A
    // having some elements.
    var A = [ 1, 2, 3, 4, 5 ];
  
    // include() function is called to
    // test whether the searching element
    // is present in given array or not.
     a = A.includes(2)
  
    // Printing result of function.
    document.write(a);
</script>

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Output:

 true

Code #2:

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<script>
   // Taking input as an array A
   // having some elements.
    var name = [ 'gfg', 'cse', 'geeks', 'portal' ];
  
   // include() function is called to
   // test whether the searching element
   // is present in given array or not.
    a = name.includes('cat')
  
    // Printing result of function
    document.write(a);
</script>

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Output:

 false


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Improved By : nidhi_biet