Added a Recursion folder and tower of hanoi problem in it in java

Java/Recursion/TowerOfHanoi.java

@@ -0,0 +1,18 @@
+// This function will give you step by step method to solve the tower of hanoi for n disks
+public class TowerOfHanoi {     //time complexity = O(2**n)
+    public static void towerOfHanoi(int n, String source, String helper, String dest){
+        //taking function arguments: n = number of disks, source, helper and destination
+        if(n == 1){ //Base case: when there is only one disk we will simply transfer ir from source to destination
+            System.out.println("Transfer disk " + n + " from " + source + " to " + dest);
+            return;
+        }
+        towerOfHanoi(n-1, source, dest, helper); //we will use recursive call for remaining n-1 disks by using destination as helper and helper as destination
+        System.out.println("Transfer disk " + n + " from " + source + " to " + dest);
+        towerOfHanoi(n-1, helper , source , dest); //again making recursive call now taking source as helper and helper as source
+    }
+
+    public static void main(String[] args) {
+        towerOfHanoi(3, "A", "B", "C");
+    }
+}
+//you can understand this more clearly by using visual solving for n=3