Update PowerOf2.java

Author: Trilochna

Recursion/PowerOf2/PowerOf2.java

@@ -4,10 +4,14 @@ class PowerOf2 {
 
     static int PowerOfTwo(int n){
 
+        // base case 
+        
         if(n==0){
             return 1;
         }
 
+        // recursive relation
+        
         return 2*PowerOfTwo(n-1);
 
 //        int small_problem = PowerOfTwo(n-1);