javascript find factorial

factorials.js

// question: 
// write an function that will find the factorial of a given number


//Loop [Fastest] -------------------------------
 function factorial (n) {
  var i, pN;

   if(n === 0) { return }
   else {
     pN = 1;
     for (i = 1; i <= n; i +=1) {
       pN *= i;
     }
   }
return pN;
}

console.log(factorial(10))


//recursive -------------------------------

function factorial(n) {
    if(n == 0) { return }
    } else {
        return n * factorial(n - 1);
    }
}
console.log(factorial(10));