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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