Novice question.. please help.

Im still new into C programming, and I have a quick question:

How do you make a kind of subprogram within a program? No, not really a program but more like sequence of commands so I woudn't have to repeatedly declare it again and again?

If my question is too confusing to understand (sorry 'bout that ), what Im talking about is C's version of Pascal's procedure.

It's called a function in C.

Code:

#include <stdio.h>

void foo(void) //a function!
{
   printf("Hello");
}

int main(void)
{
   foo();
   return 0;
}