∅In C, the main function is the entry point of the program. The return 0; statement at the end of the main function indicates successful program execution. In C, the main function returns an integer value, and by convention, returning 0 signifies that the program executed successfully without errors. Non-zero return values can be used to indicate errors or abnormal termination of the program. Thus, return 0; is a standard way of signaling that the program completed its execution as expected.