What do we mean by returning a value when we use int main function?

Answer 1

The compiler you're using to run the code will usually add the command for you, so it's not necessary to write return 0.

However it's convention to return 0 at the end of your main function, so you probably should anyways.

Answer 2

it means that if your program return zero from int main..your program worked perfectly

Answer 3

so is it necessary to write return 0; or the function can do it itself too?

Answer 4

and what if I'm using void main, how can I check for errors?
and when do we use void main?

Answer 5

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