Answer Posted / amit jha

1. main() itself is a predefined function.

where as main() is a userdefined function because there we
are writing the internal part.

2. it is an inbuilt function i.e, main() it indicates the
starting of the program and it is a user defined function
when the user defines it as void main() or int main(void).

3. A program usually stops executing at the end of main,
although it can terminate at other points in the program
At times, perhaps when a certain error is detected, you
may want to force the termination of a program. To do so,
use the exit function. so that main() is a user defined
function.

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