. Recursion of no. public class AddNumbers { public static void main(String[] args) { int number = 20; int sum = addNumbers(number); System.out.println("Sum = " + sum); } public static int addNumbers(int num) { if (num != 0) return num + addNumbers(num - 1); else return num; } }

. Recursion of no.

public class AddNumbers {

 public static void main(String[] args) {

 int number = 20;

 int sum = addNumbers(number);

 System.out.println("Sum = " + sum);

 }

 public static int addNumbers(int num) {

 if (num != 0)

 return num + addNumbers(num - 1);

 else

 return num;

 }

}