Practice Done.

Signed-off-by: Someshdiwan <[email protected]>

Author: Someshdiwan

Section10Methods/RecurssionPractice/src/FactorialProgram.java

@@ -0,0 +1,27 @@
+public class FactorialProgram {
+    public static void main(String[] args) {
+        System.out.println(factorial(7));
+
+        /*
+        Number Multiply by each Preceding number.
+        5! = 5 * 4 * 3 * 2 * 1 = 120
+
+        if u called method inside itself i will repeat infinite many times.
+        need Base case to know when to stop the method.
+        Base case need.
+        */
+
+    }
+    public static int factorial(int n)
+    {
+        if(n == 1) {
+            System.out.println("Factorial("+n+") = 1");
+            //Base case is 1. Factorial of 1 is 1.
+            return 1;
+        }
+        else {
+            System.out.println("Factorial(" + n + ") = " + n + " * Factorial(" + (n-1)+ ")"); //Printing current value and Formula version.
+            return n * factorial(n - 1); //current number n and n * ( n - 1);
+        }
+    }
+}