Program to find the area of circle

#include<stdio.h>

main()

{

      printf("FIND AREA OF CIRCLE\n");

      float r,pi=3.14,area;

      printf("Enter the value for radius : ");

      scanf("%f",&r);

      area=pi*r*r;

      printf("\nArea of circle is :%.2f",area);

      getch();

}