What does it mean the "return 0"

Question

Cout << "hellow word!";
Cout << "i love this";
return 0;

Answer 1

The value your program returns to the operating system can indicate if it ran successfully or if execution failed.
A return value of 0 indicates success and any non-zero value indicates failure.

There are only two truly portable return values: EXIT_SUCCESS (i.e 0) and EXIT_FAILURE. If you want to return a value other than these you have to check what range of error codes your platform supports.

Answer 2

Thanx so much..

Answer 3

Jegix thank you..