Difference between pre-increment and post-increment in a loop?

Question

Is there a difference in ++i and i++ in a for loop? Is it simply a syntax thing?

Answer 1

For i's of user-defined types, these operators could (but should not) have meaningfully different sematics in the context of a loop index, and this could (but should not) affect the behavior of the loop described.

Also, in c++ it is generally safest to use the pre-increment form (++i) because it is more easily optimized. (Scott Langham beat me to this tidbit. Curse you, Scott)