Question

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What should main() return in C/C++?
why do we give int main in c++ and not void main?

I’ve started learning C++ and the following question came up to my mind: main() always return int? Cannot I declare void main() instead of int main()?

Thanks you!

Answer 1

Yes, main() must return int. The return value is passed back to the operating system, to indicate whether the program ran successfully: zero means success.

However, you can leave the return statement out of main (and only main) if you like; in that case, it will return zero.