JQuery | inArray() method

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This inArray() Method in jQuery is used to search for a specific value in an array and return its index (or -1 if not found).

Syntax:

jQuery.inArray(val, arr [, Index])

Parameters: The inArray() method accepts few parameters that are mentioned above and described below:

val: The value to search in an array.
arr: Any array like object.
Index: Index of the array from which to begin search.

Return Value: It returns the index of the element in an array.

Example 1: In this example, the inArray() method searches the element ‘geek’ in the array.

<!DOCTYPE HTML>  
<html> 
  
<head>  
    <title>  
        JQuery | inArray() method 
    </title> 
      
    <script src =  
"https://ajax.googleapis.com/ajax/libs/jquery/3.4.0/jquery.min.js"> 
    </script> 
</head>  
  
<body style="text-align:center;">  
      
    <h1 style="color: green">  
        GeeksForGeeks  
    </h1>  
      
    <p id="GFG_UP"></p> 
      
    <button onclick="gfg_Run()">  
        Click Here  
    </button>  
      
    <p id="GFG_DOWN" style="color:green;"></p> 
      
    <script>  
        var el_up = document.getElementById("GFG_UP");  
        var el_down = document.getElementById("GFG_DOWN"); 
          
        var arr = ["GFG", "GeeksForGeeks", "Geek", "Geeks"]; 
        var val = "Geek"; 
          
        el_up.innerHTML = "Click on the button to " 
                        + "search the element.<br>" 
                        + "Array - [" + arr +  
                        "]<br>Element - '" + val + "'"; 
          
        function gfg_Run() {  
            el_down.innerHTML = $.inArray(val, arr);  
        }  
    </script>  
</body>  
  
</html> 

Output:

Example 2: In this example, the inArray() method searches the element ‘geek’ in the array as in the previous example. But, index attribute is also passed to search the element from index 3 and return -1.

<!DOCTYPE HTML>  
<html> 
  
<head>  
    <title>  
        JQuery | inArray() method 
    </title> 
  
    <script src =  
"https://ajax.googleapis.com/ajax/libs/jquery/3.4.0/jquery.min.js"> 
    </script> 
</head>  
  
<body style="text-align:center;">  
  
    <h1 style="color: green">  
        GeeksForGeeks  
    </h1>  
  
    <p id="GFG_UP"></p> 
  
    <button onclick="gfg_Run()">  
        Click Here  
    </button>  
  
    <p id="GFG_DOWN" style="color:green;"></p>  
  
    <script>  
        var el_up = document.getElementById("GFG_UP");  
        var el_down = document.getElementById("GFG_DOWN"); 
          
        var arr = ["GFG", "GeeksForGeeks", "Geek", "Geeks"]; 
        var val = "Geek"; 
  
        el_up.innerHTML = "Click on the button to search" 
                + "the element.<br>Array - [" + arr +  
                "]<br>Element - '" + val + "'";  
                  
        function gfg_Run() {  
            el_down.innerHTML = $.inArray(val, arr, 3);  
        }  
    </script>  
</body> 
  
</html> 