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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.


<!DOCTYPE html>
<h2>TutorialsTrend - JavaScript Programes</h2>

function factorial(num) {
if (num === 0) {
return 1;
} else {
return num * factorial(num - 1);
document.write("Factorial Value="+factorial(5)); // 120


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