Program to find the area and circumference of a circle in C.

#include<stdio.h>

void main()
{
     
	float r , area , circumference ;
	
	printf("radius : ");
	scanf("%f" , &r);
	
	area = 3.14 * r * r;
	circumference = 2 * 3.14 * r ;
	
	printf("area = %f\n" , area);
	printf
("circumference = %f\n" , circumference);
}