Why should the compiler return 0?

Question

Why should we use 'return 0;'statement at the end of our program?

Answer 1

Please scroll back down to the 3 other times this question has been asked today. Return 0 from main indicates that the program has successfuly exited, 0 indicating no errors, and other values such 1 indicate the program has exit with errors. Credit to Zen for answering this 3 times today, haha.