How to check if a number is palindrome in JavaScript

1 Answer

<!DOCTYPE html>
<html>
<head></head>
<body>

<script type="text/javascript">

function reverse_number(num)
{
    var rev = 0;
    
    while (num > 0)
    {
        rev = rev * 10 + (num % 10);
        num = parseInt(num / 10);
    }
    
    return rev;
}

var n = 12321;

if (reverse_number(n) == n)
    document.write("Palindrome<br/>");
else
    document.write("NOT Palindrome<br />");

</script>

</body>
</html>

<!--
run: 

Palindrome

-->

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answered Feb 22, 2016 by avibootz

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How to check if a number is palindrome in JavaScript

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