Area of circle

                     

Area of circleArea of circleArea of circleArea of circleArea of circleArea of circleArea of circleArea of circleArea of circleArea of circleArea of circleArea of circleArea of circleArea of circleArea of circleArea of circleArea of circleArea of circleArea of circleArea of circleArea of circleArea of circleArea of circleArea of circleArea of circleArea of circleArea of circleArea of circleArea of circleArea of circleArea of circleArea of circleArea of circleArea of circleArea of circleArea of circleArea of circleArea of circleArea of circleArea of circleArea of circleArea of circleArea of circleArea of circleArea of circleArea of circleArea of circleArea of circle

#include <stdio.h>
float pi = 3.14;
int
main ()
{
  float r, A;

  printf ("Enter radius in m ");
  scanf ("%f", &r);
  A = pi * r * r;
  printf ("The area of circle having radius %f is %f meter square", r, A);

}