Program to calculate circumference of the circle

  /*Program to find circumference of the circle*/

#include <stdio.h>

#define PI 3.14

int main()

{

float r,circumference;

printf("Enter the radius of the circle:");

scanf("%f",&r);

circumference=2*PI*r;

printf("The circumference of the circle is %.2f",circumference);

return 0;

}

OUTPUT

Enter the radius of the circle: 2.7

The circumference of the circle is 16.96

Description:

Here we ask the user to give the radius of the circle and the value of PI is defined by define function.