C Program to Find Area and Circumference of Circle

#include<stdio.h>

#include<conio.h>

int main()

{

int rad;

float PI= 3.14, area, ci;

printf("\nEnter the 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);

getch();

}

Output:
Enter the radius of Circle: 1
Area of Circle: 3.14
Circumference: 6.28