Function with no arguments and no Return Value In C

  • These function do not take information from the calling function nor do they pass information to calling Program
#include<stdio.h>
#include<conio.h>
//----------------------------------------
  void area();  // Prototype Declaration
//----------------------------------------
void main()
{
clrscr();
   area();
getch();
}
//----------------------------------------
void area()
{
float ar;
   printf("\nEnter the radius : ");
   scanf("%f",&rad);
   ar = 3.14 * rad * rad ;
   printf("Area of Circle = %f",ar);
}
Output :
Enter the radius : 3
Area of Circle = 28.260000

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