++i or i++ in for loops ??

Question

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Is there a performance difference between i++ and ++i in C++?

Is there a reason some programmers write ++i in a normal for loop instead of writing i++?

Answer 1

For integers, there is no difference between pre- and post-increment.

If i is an object of a non-trivial class, then ++i is generally preferred, because the object is modified and then evaluated, whereas i++ modifies after evaluation, so requires a copy to be made.