Void Functions in C

Functions may be return type functions and non-return type functions. The non-return type functions do not return any value to the calling function; the type of such functions is void. These functions may or may not have any argument to act upon. A few illustrations of such functions are given below.

void Write (void) {
  printf("You need a compiler for learning C language.\n");
}

The first line in the above definition may also be written as

void Write ()

Program presents an example where a void function is defined to display a message.

Illustrates a void function with void parameter list.

#include<stdio.h> 
 void Display(void); //Function prototype, void parameter list 
void main() { 
 Display(); //the function call 
} //end of main function 
void Display() { // Definition of Display 
 printf("Play an outdoor game for better health.\n"); 
 printf("Also remember \"It is practice which makes a man/woman 
 perfect in programming in C.\"\n"); 
}

The expected output of the above program is as given below.