c - main() functions return value?

Question

Anyone please tell me where the main() function of the 'C' language returns its value?

Answer 1

C's main function returns an int... that int goes to the program which executed it (the parent process, if you will) as an exit status code.

Specifically, on most operating systems, a 0 exit code signifies a normal run (no real errors), and non-zero means there was a problem and the program had to exit abnormally.