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How to check whether a value is numeric or not using jQuery ?

  • Last Updated : 11 Sep, 2019

Given an input element and the task is to check whether the entered value is numeric or not using jQuery. The jQuery $.isNumeric() method is used to check whether the entered number is numeric or not.

$.isNumeric() method: It is used to check whether the given argument is a numeric value or not. If it is numeric then it returns true Otherwise returns false.

Syntax:

$.isNumeric( argument )

Example 1: This example uses jQuery .isNumeric() method to check entered element is numeric or not.




<!DOCTYPE html>
<html>
  
<head>
    <title>
        How to check whether a value is
        numeric or not in jQuery?
    </title>
      
    <script src=
    </script>
</head>
  
<body style="text-align:center;">
      
    <h1 style = "color:green;"
        GeeksForGeeks 
    </h1
      
    <h3>
        How to check whether a value
        is numeric or not in jQuery?
    </h3>
      
    <hr>
      
    <form>
        <p>
            Enter any value: 
            <input style="text-align:center;" type="text">
        </p>
          
        <button type="button">Click to Check</button>
    </form>
    <hr>
      
    <script type="text/javascript">
        $(document).ready(function() {
            $("button").click(function() {
                var inputVal = $("input").val();
                alert($.isNumeric(inputVal));
            });
        });
    </script>
</body>
  
</html>          

Output:

  • Before entering the value:
  • Entering the value:
  • After click on the button:

Example 2: This example uses jQuery .isNumeric() method to check entered element is numeric or not.




<!DOCTYPE html>
<html>
  
<head>
    <title>
        How to check whether a value
        is numeric or not in jQuery?
    </title>
      
    <script src=
    </script>
</head>
  
<body style="text-align:center;">
      
    <h1 style = "color:green;"
        GeeksForGeeks 
    </h1
      
    <h3>
        How to check whether a value 
        is numeric or not in jQuery?
    </h3>
    <hr>
      
    <form>
        <p>
            Enter any value: 
            <input style="text-align:center;" type="text">
        </p>
          
        <button type="button">Click to Check</button>
    </form>
    <hr>
      
    <h4></h4>
      
    <script type="text/javascript">
        $(document).ready(function() {
            $("button").click(function() {
                var inputVal = $("input").val();
                var gfg = $.isNumeric(inputVal);
                  
                if (gfg) {
                    $("h4").text("The Value Entered is Numeric");
                }
                else {
                    $("h4").text("The Value Entered is Not Numeric");
                }
            });
        });
    </script>
</body>
  
</html>  

Output:

  • Before Entering the value:
  • After entering the value and click on button:



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