Comment revisions

Maths/Factorial.java

@@ -1,25 +1,28 @@
 package Maths;
 
+//change around 'n' for different factorial results
 public class Factorial {
     public static void main(String[] args) {
         int n = 5;
         System.out.println(n + "! = " + factorial(n));
     }
 
+    //Factorial = n! = n1 * (n-1) * (n-2)*...1
+
     /**
-     * Calculate factorial
+     * Calculate factorial N
      *
      * @param n the number
      * @return the factorial of {@code n}
      */
     public static long factorial(int n) {
         if (n < 0) {
-            throw new ArithmeticException("n < 0");
+            throw new ArithmeticException("n < 0");     //Dont work with less than 0
         }
         long fac = 1;
         for (int i = 1; i <= n; ++i) {
             fac *= i;
         }
-        return fac;
+        return fac; //Return factorial
     }
 }