A function is a independent block of statements that accomplish a articular assignment of some kind. Every C affairs can be anticipation of as a accumulating of these functions. As they acclaimed earlier, application a function is something like hiring a being to do a specific job for you. In the above programs we have used main at the starting, this main() itself is a function.A simple program illustrating the use of function is given below:



/*Example showing use of a function*/


main( )
{
printf ( "\nI am in main" ) ;
america( ) ;
printf ( "\nI am finally back in main" ) ;
}
america( )
{
printf ( "\nI am in america" ) ;
india( ) ;
printf ( "\nI am back in america" ) ;
}
india( )
{
printf ( "\nI am in india" ) ;
pakistan( ) ;
}
pakistan( )
{
printf ( "\nI am in pakistan" ) ;
}

Output:


I am in main
I am in america
I am in india
I am in pakistan
I am back in america
I am finally back in main