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= 
"https://code.jquery.com/jquery-1.12.4.min.js"> 
    </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= 
"https://code.jquery.com/jquery-1.12.4.min.js"> 
    </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>   