[DUPLICATE] Why int main() {} instead of void main() {}?

Question

Why does the main function have to return a value?

Answer 1

Yes, its int main() because it returns 0.

#include <iostream>
using namespace std;

int main() {

return 0; //Here
}

Answer 2

Yeah, main() has to return a zero to the operating system so that your operating system knows it finished successfully as per the C++ specification.