Is main() a user-defined function or a predefined function ?

Question

We do write content in main() but we can't name the main function anything, we have to name it main(). Then what is main() user-defined or predefined?

Answer 1

The jvm searches for a method called main as a starting point to begin executing your code, it only knows that there should be a main method somewere in one of your classes so yes you need to define it as it's not built in.

Answer 2

~ swim ~ D_Stark What about in C and C++?
Is main() predefined or user defined?
I read that main() cannot be overloaded and is pre-defined in the compiler but the its implementation is done by the programmer/user. So it's both predefined and user-defined.

What are your reviews about it?

Answer 3

I see, now it makes sense to me. Thanks for clarification.

Answer 4

It can be considered as a starting point for the program because the control flow in C starts with main() rather like languages as python will execute the code line by line.
Main() cannot be considered as a predefined function because the user himself should write it's definition. And it is not completely user defined because the compiler pre-declared it. In c main is not a keyword as it can be used as a variable name also.

Answer 5

So is it predefined or user-defined or both?