I think the main() function is a piece of code that groups the main game into one category.
I think you are a little bit overthinking this. Main() function is just code that runs first when your program starts
main() is a function called when the program starts to run.
Personally I think the main function is similar to the c# version. In essence it defines what file you are pulling the code from.
i think the main function is the crucial part of the code ,and it runs the program .