Basic C

#include<stdio.h>
#include<conio.h>

• # => The Pre-processor is the part of the compiler which fetch your program from file.
• <stdio.h>&<conio.h> => These are the basic libraries formed which helps the programmer or coder to run some particular functions without lots of efforts.

main()

• fun() is a function which could be pre-defined or user-defined.
• Function is a sub-program that contains one or more statements and it performs some task when called.