operators/flow control

Question 1

Will a post-increment produce a different output than the pre-increment in the following for loop?

(for int i = 0; i < 10; ++i) { System.out.println(i): }

Answer 1

Nope, it sure won’t.

The flow goes like:

1. test the condition
2. if it is false, terminate
3. if it is true, execute the body
4. execute the incrementation step

Question 2

Does the following compile?

System.out.println(null + null);

Answer 2

No.

Only if it were concatenating to a string will null not cause compilation error.