this post was submitted on 24 Aug 2021
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C & C++

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What is the difference between ++i and i++? (lemmy.ml)
submitted 3 years ago by [email protected] to c/[email protected]
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I haven't really understood the difference between

i++ and ++i

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[–] [email protected] 1 points 3 years ago

Yeah the value copy is necessary to return the old (pre-increment) value with i++. However, your compiler is (usually) smart enough to optimize the copy away if you never use it.

That being said, being explicit is good, so use ++i if you don't need the old value. Don't depend on the compiler to maybe do something.