diff --git a/calculator/calculator.js b/calculator/calculator.js
index be09295..660e58a 100644
--- a/calculator/calculator.js
+++ b/calculator/calculator.js
@@ -19,7 +19,7 @@ function power(a, b) {
 }
 
 function factorial(n) {
-  if (n == 0) return 0;
+  if (n == 0) return 1;
   let product = 1;
   for (let i = n; i > 0; i--) {
     product *= i;
@@ -27,6 +27,15 @@ function factorial(n) {
   return product;
 }
 
+// This is another implementation of Factorial that uses recursion
+// THANKS to @ThirtyThreeB!
+function recursiveFactorial(n) {
+  if (n===0){
+    return 1;
+  }
+  return n * factorial (n-1);
+}
+
 module.exports = {
   add,
   subtract,