multiples/multiples.html at master · playlend/multiples · GitHub

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<!DOCTYPE html>
<html>
<head>
	<title>Multiples of 3 and 5</title>
</head>
<body>
<script>
	// prompt the user about multiples
	alert("Welcome to the program that adds looks for multiples of two numbers and finds it sum!");
	var num1 = prompt("Please, enter the first number: ");
	var num2 = prompt("Please, enter the second number: ");
	var endValue = prompt("Please, enter a number among which to look for multiples of " + num1 + " and " + num2 + ":");
	var total = 0;

	// create a for loop that writes all the multiples into
	// the array

	for (var counter = 0; counter < endValue; counter++)
	{
		// creating if statement that is checking if the
		// counter is multiple
		if ((counter%num1 === 0) || (counter%num2 === 0))
		{

			total = total + counter;

		}

	}

	alert("The sum of all multiples of " + num1 + " and " + num2 + " below " + endValue + " is: " + total);

</script>
</body>
</html>