2014年1月4日 · That is, even if your output is 10, you return 0. Every command returns an exit status (sometimes referred to as a return status or exit code). A successful command returns a 0 , while an unsuccessful one returns a non-zero value …

2013年2月18日 · return 0; at the end of functions that don't return a value. This isn't used in PHP, because if a function is doesn't have a return, a value NULL is automatically returned.

2022年6月20日 · return 0: A return 0 means that the program will execute successfully and did what it was intended to do. return 1: A return 1 means that there is some error while executing the program, and it is not performing what it was intended …

2012年1月2日 · In plain English: The function main returns the value 0. The C++ standard describes how this is to be interpreted by the host environment. In the Unix shell, it allows you to tell whether the command succeeded or not, and maybe why it failed if it failed.

2023年1月2日 · In C, we can only return a single value from the function using the return statement and we have to declare the data_type of the return value in the function definition/declaration. Syntax: There are various ways to use return statements. A few are mentioned below: 1. Methods not returning a value.