Read carefully the following program:

1. import java.util.Scanner;

2. public class sum

3. {

4. public static void main(String[] args)

5. {

6. Scanner input = new Scanner(System.in); 

7. int n = input.nextInt();

8. int sum = 0;

9. for (int i = 1; i <= n; i++) {

10. sum = sum + i;

11. }

12. System.out.println(sum);

13. }

14. }

Suppose the input to this program is the integer 10. What is the output?