What happen if we se return 1; in place of return 0;

Question

C++

Answer 1

return n; from your main entry function will terminate your process and report to the parent process (the one that executed your process) the result of your process. 0 means SUCCESS. ...returning different values like return 1or return -1 means that program is returning error

Answer 2

0 means the program executed without any problems. If you put 1, it means there was an error. It doesn't matter unless another program runs your program and wants to know if it executed correctly.