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JavaScript Factorial Program
Factorial Program
This program calculates the factorial of a given number. The factorial function says to multiply all the whole numbers from the chosen number down to one. In more mathematical terms, the factorial of a number (n!) is equal to n(n-1).
For example, if you want to calculate the factorial for four, you would write:
4! = 4 x 3 x 2 x 1 = 24.
Program
<!DOCTYPE html>
<html>
<head>
<title></title>
</head>
<body>
<h2>TutorialsTrend - JavaScript Programes</h2>
<script>
function factorial(num) {
if (num === 0) {
return 1;
} else {
return num * factorial(num - 1);
}
}
document.write("Factorial Value="+factorial(5)); // 120
</script>
</body>
</html>Output
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