JavaScript code to check number is Armstrong or not

In this JavaScript code, we are going to check whether a given number is Armstrong number or not.
Submitted by Aleesha Ali, on March 28, 2018

Armstrong number

A number is said to be Armstrong when its value is equal to its sum of cube of digits.

Example:

    Input:
    Number: 153

    Output:
    It is a prime number

    Explanation:
    153 = (1*1*1) + (5*5*5) + (3*3*3) = 1+125+27 = 153
    Here, number (153) is equal to its sum of the digits cube (153).

JavaScript code to check whether a Number is Armstrong or Not

<script>
	function Armstrong()
	{
		var flag,number,remainder,addition = 0;
		number = Number(document.getElementById("N").value);

		flag = number;
		while(number > 0)
		{
			remainder = number%10;
			addition = addition + remainder*remainder*remainder;
			number = parseInt(number/10);
		}

		if(addition == flag)
		{
			window.alert("-The inputed number is Armstrong");
		}
		else
		{
			window.alert("-The inputed number is not Armstrong");
		}
	}
</script>

Calling JavaScript function in HTML (HTML, JS Code)

<html>
	<head>
		<script>
			function Armstrong()
			{
				var flag,number,remainder,addition = 0;
				number = Number(document.getElementById("N").value);

				flag = number;
				while(number > 0)
				{
					remainder = number%10;
					addition = addition + remainder*remainder*remainder;
					number = parseInt(number/10);
				}

				if(addition == flag)
				{
					window.alert("-The inputed number is Armstrong");
				}
				else
				{
					window.alert("-The inputed number is not Armstrong");
				}
			}
		</script>
	</head>
	<body>
		<br>
		<h1>Whether a number is Armstrong or not</h1>
		Enter The Number :<input type="text" name="n" id = "N"/>
		<hr color="cyan">
		<br>
		<center><button onClick="Armstrong()">CHECK</button>
	</body>
</html>