1. public class test {
2. public static string output = “”
3.
4. public static void foo(int i) {
5. try {
6. if(i= =1) {
7. throw new Exception ();
8. }
9. output += “1”;
10.}
11. catch(Exception e) {
12. output += “2”;
13. return;
14.}
15. finally (
16. output += “3”;
17. )
18. output += “4”;
19. }
20.
21. public static void main (string args[]) (
22. foo(0);
23. foo(1);
24.
25. )
26. }
What is the value of the variable output at line 24?()