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Baris DerinCourses Plus Student 443 Points
Can 'main function' return a value expect 0? Is it because we use int, we should use an integer value? Can we use float rather than int? Actually is it really necessary to use return? For example can we just use printf at the end of the function for checking?
if you just used a printf statement at the end, the compiler would throw you an error, because you have reached the end of a non-void statement.
The "int" before main indicates that the main function expects you to return an integer, not doing this or returning anything else will cause errors.
Sebastian Döll24,464 Points
The return value of the main function defines the exist status of the program as it is exited. You can do all kinds of stuff in between the execution of the main function, but eventually you should return something as to provide the status to the system.