fix: Enhance error handling in factorial function (#1430)

Recursive/Factorial.js

@@ -9,17 +9,14 @@
  */
 
 const factorial = (n) => {
-  if (!Number.isInteger(n)) {
-    throw new RangeError('Not a Whole Number')
-  }
-
-  if (n < 0) {
-    throw new RangeError('Not a Positive Number')
+  if (!Number.isInteger(n) || n < 0) {
+    throw new RangeError('Input should be a non-negative whole number')
   }
 
   if (n === 0) {
     return 1
   }
+
   return n * factorial(n - 1)
 }