C Program to Enter Radius of a Circle and Find its Diameter, Circumference and Area ?

Q:-  Write a C Program to Enter Radius of a Circle and Find its Diameter, Circumference and            Area ?

Input

#include<stdio.h>

#include<conio.h>

int main()

{

float  radius,dia,circum,area;

clrscr();

printf(“Enter Radius of Circle=”);

scanf(“%f”,&radius);

dia=2*radius;

circum=2*3.14*radius;                    // π=22/7=3.14

area=3.14*radius*radius;

printf(“Diameter of Circle=%.2f\n”,dia);

printf(“Circumference of Circle=%.2f\n”,circum);

printf(“Area of Circle=%.2f\n”,area);

getch();

}

Output

Enter Radius of Circle = 10

Diameter of Circle = 20.00 units

Circumference of Circle = 62.79.00 units

Area of Circle = 314.00 sq. units