C Program to find area and circumference of circle.

C Program to find area and circumference of circle.

#include<stdio.h>

int main() {

   int rad;

   float PI = 3.14, area, ci;

   printf("\nEnter radius of circle: ");

   scanf("%d", &rad);

   area = PI * rad * rad;

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

   ci = 2 * PI * rad;

   printf("\nCircumference : %f ", ci);

   return (0);

}

 Output:-

Enter radius of a circle : 1

Area of circle : 3.14

Circumference  : 6.28