# return statement

Jim Colwood
Greenhorn
Posts: 10
Hi all,

any idea why this would return "Sum = 15" and not "Sum = 1"?

couldn't find a similar thread with my brief search in the forum.
Thanks.

W. Joe Smith
Ranch Hand
Posts: 710
I was wrong, so I deleted this post. Don't want false information floating out there confusing everyone! See below post for correct answer.

Ruben Soto
Ranch Hand
Posts: 1032
Calculate calls itself recursively, so:
Calculate(5) = Calculate(4) + 5
= Calculate(3) + 4 + 5
= Calculate(2) + 3 + 4 + 5
= Calculate(1) + 2 + 3 + 4 + 5
= 1 + 2 + 3 + 4 + 5
= 15

Devaka Cooray
ExamLab Creator
Marshal
Posts: 4328
238

Jim Colwood
Greenhorn
Posts: 10

Ruban, your calculation is right. but the real question i have is, even if the FIRST return statement returns the int, why is the returned value 15?

I had a question with similar logic in a Java test offered to me by a recruiter.
Thanks again.

Henry Wong
author
Marshal
Posts: 21021
78
Ruban, your calculation is right. but the real question i have is, even if the FIRST return statement returns the int, why is the returned value 15?

The FIRST return statement did return an int, but not to the main() method -- it returned it back to the calculate() method, which called it. If the main() method had triggered the FIRST return statement, then it would have printed 1.

Henry

Jim Colwood
Greenhorn
Posts: 10
Duh! it seems simple after you explained it, but it's easy to miss it.

Thanks a lot Henry.

 It is sorta covered in the JavaRanch Style Guide.