. 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;
 }
}