program to find the factorial of a number

find-factorial.js

// program to find the factorial of a number
function findFactorial(num) {

    // if number is 0
    if (num === 0) {
        return 1
    } else {
	// if number is positive, 
	// multiply number with response of function findFactorial(num - 1), 
	// having argument one less than num
        return num * findFactorial(num - 1)
    }
}

const num = 3; // declare and initialize a variable with value 3

// calling function findFactorial() if num is non-negative
if (num > 0) {
    const result = findFactorial(num)
    console.log(`The factorial of ${num} is ${result}`)
}

/*
THE OUTPUT IS:

"The factorial of 3 is 6"

*/