Branch1

src/Main.java

@@ -1,5 +1,15 @@
 public class Main {
 
+
+    public static void sum (int a, int b) {
+        System.out.println(a+b);
+    }
+
+    public static void prod (int a, int b) {
+        System.out.println(a*b);
+    }
+
+
     public static Double factorial(Integer a) {
 
         double fact = 1;
@@ -9,8 +19,12 @@ public static Double factorial(Integer a) {
         }
         return fact;
     }
-
     public static void main(String[] args) {
+        System.out.println("Hello world!");
+        sum(10,20);
+        prod(10,20);
+
         System.out.println(factorial(5));
+
     }
 }