C Program to find area and circumference of circle

#include<stdio.h>

 

int main() {

 

   int radius;

   float PI = 3.14, area, circle;

 

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

   scanf("%d", &radius);

 

   area = PI * rad * rad;

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

 

   circle = 2 * PI * rad;

   printf("\nCircum. :- %f ", circle);

 

   return (0);

}

OUTPUT

Enter radius of a circle :- 1

Area of circle :- 3.14

Circum.  :- 6.28