C Program to find diameter & circumference & area of circle

				
					#include<stdio.h>
int main(){
	
	//c program to calculate diameter, circumference and area of circle
	
	float radius, diameter, circumference, area;
	
	//input radius of circle from user
	
	printf("Enter Radius of Circle:- ");
	scanf("%f",&radius);
	
	//Calculate Diameter, circumference and area
	
	diameter = 2 * radius;
	circumference = 2 * 3.14 * radius;
	area = 3.14 * (radius * radius);
	
	//print all result
	
	printf("Diameter of Circle = %f",diameter);
	printf("\nCircumference of circle = %f",circumference);
	printf("\nArea of Circle = %f",area);
	
	return 0;
}