diff --git a/src/algorithms/math/factorial/factorialRecursive.js b/src/algorithms/math/factorial/factorialRecursive.js
index e2b4aec6..945fadfe 100644
--- a/src/algorithms/math/factorial/factorialRecursive.js
+++ b/src/algorithms/math/factorial/factorialRecursive.js
@@ -3,5 +3,13 @@
  * @return {number}
  */
 export default function factorialRecursive(number) {
-  return number > 1 ? number * factorialRecursive(number - 1) : 1;
-}
+  if(number<0){
+    throw new error("factorial of a negative number does not exits.");
+  } else if(number == 0 || 1){
+    return 1;
+  }else{
+    return number * factorialRecursive(number - 1);
+  }
+
+ }
+