// Page 251
// sum = 1 + 2 + ... + n

import java.util.Scanner;
public class Prog_16_0
{
	public static int sum (int n)
	{	if (n==1)
			return 1;
		else
			return n + sum(n-1);
	}

	public static void main(String[] args)
	{
		int s = sum (3);
		System.out.println("The result is: " + s);		// ... 6
	}
}