main() in C, C++, Java, C#

Question

Is main() (or Main()) in C, C++, Java or C#, a user-defined function or a built-in function?

Answer 1

In C/C++, it a standard so its built in and reconized.

Java, not sure, no experience

C# - Its a part of a class so its defined by you.

All of these are defined by you -- you tell it what to do.