JavaScript Code

Factorial of a Number using Recursion Function

In this tutorial, you are given a number. Write a JavaScript program with a function that takes a number as argument, find the factorial of the number using recursion function, and returns the result.

Solution

Create a function findFactorial() that takes n as argument.

If n is 0 or 1, the function returns 1, else the function returns n * findFactorial(n - 1). The function calls itself, findFactorial(), hence a recursive function.

Program

In the following program, we find the factorial of a number in n using recursion function.

function findFactorial(n) {
    if (n == 0 || n == 1) {
        return 1;
    }
    return n * findFactorial(n - 1);
}

var n = 5;
console.log(n+'! = '+ findFactorial(n));