Factorial recursion example in java.

Source:

public class Factorial {
 
   public static void main(String args[]) {
 
      int x = Integer.parseInt(args[0]); 
      int result= fact(x);
      System.out.println("The factorial of " + x + ": " + result);
   }
 
   static int fact(int b) {
      if(b <= 1) {
         return 1;
      } else {
         return b * fact(b-1);
      }
   }
}

Output:

   $ java Factorial 5
   The factorial of 5: 120

   $ java Factorial 10
   The factorial of 10: 3628800