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How to check whether a value is a number in JavaScript?
To check whether a value is a number in JavaScript, use the isInteger() method. This method checks whether the value is a number or not.
Example
You can try to run the following code to check the value is a number or not −
<html>
<head>
<title>JavaScript isInteger() Method </title>
</head>
<body>
<script>
document.write(Number.isInteger(30));
document.write("<br>"+Number.isInteger(true));
document.write("<br>"+Number.isInteger(false));
document.write("<br>"+Number.isInteger(-30));
</script>
</body>
</html>
Published on 18-Jan-2018 11:50:41
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