C++ question

Question

What is return 0; mean in C++.

Answer 1

return 0 in C/C++ means returns the value 0 from current function to caller function. In the main() the value will be returned to system.

It is not necessary that every time we should use return 0 to return program's execution status from the main() function. But returned value indicates program's success or failure to the operating system and there is only one value that is 0 which can indicate success and other non zero values can indicate failure of execution due to many reasons like memory leak, etc