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Check number is palindrome or not in JavaScript

Here, we are going to learn how to check whether a given number is palindrome or not in JavaScript.
Submitted by Aleesha Ali, on March 24, 2018

Palindrome number

When a number doesn’t change it’ s value or meaning even after rotation from left to right or vice a versa, then the number is palindrome number.

For example: 12321 after rotation 12321number is still same.

JavaScript code to check palindrome number

<script>
	function Palindrome()
	{
		var rem, temp, final = 0;
		var number = Number(document.getElementById("N").value);

		temp = number;
		while(number>0)
		{
			rem = number%10;
			number = parseInt(number/10);
			final = final*10+rem;
		}
		if(final==temp)
		{
			window.alert("The inputed number is Palindrome");
		}
		else
		{
			window.alert("The inputted number is not palindrome");
		}
	}
</script>

Calling JavaScript function in HTML (HTML, JS Code)

<html>
	<head>
		<script>
			function Palindrome()
			{
				var rem, temp, final = 0;
				var number = Number(document.getElementById("N").value);

				temp = number;
				while(number>0)
				{
					rem = number%10;
					number = parseInt(number/10);
					final = final*10+rem;
				}
				if(final==temp)
				{
					window.alert("The inputed number is Palindrome");
				}
				else
				{
					window.alert("The inputted number is not palindrome");
				}
			}
		</script>
	</head>
	<body>
		<br>
		<h1>Whether a number is Palindrome or not</h1>
		Enter The Number :<input type="text" name="n" id = "N"/>
		<hr color="cyan">
		<br>
		<center><button onClick="Palindrome()">CHECK</button>
	</body>
</html>

Output

JS - check palindrome output






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