Factorial Function in JavaScript - Quick Explanation.

Factorial is a mathematical formula that multiplies a number by every number below it down to one.

when you see this code example,

function factorial(n) {
if (n == 0) {
return 1;
} else {
return factorial(n - 1) * n;
}
13
}
console.log(factorial(8));
// → 40320

Here's how it's solved

• if n is 0, it returns 1 and ends the condition for recursion, else
• if n is not 0, it calls itself with n-1 multiplied by n

Finding factorial(8)

factorial(n - 1) * n

n becomes 8 - we can say that 8 is the argument that is passed to the factorial function

factorial (n-1)*n

is simply

(8-1) * 8

which becomes

factorial (7 )* 8

First, find the factorial of 7 then multiply the result by 8

7! is 7x6x5x4x3x2x1 - which equals to 5040

Multiply the result of the factorial of 7 by 8

5040 * 8 equals 40320

Finir!