5. Write a C program to enter radius of a circle and find its diameter, circumference and area.

5. Write a C program to enter radius of a circle and find its diameter, circumference and area.

Solution :-
#include<conio.h>
#include<stdio.h>
void main()
{
    clrscr();
    float radius,area,circumference,diameter,pi=3.14;
    printf("Enter the radius :-");
    scanf("%f",&radius);
    area =pi*radius*radius;
    diameter = 2*radius;
    circumference =2*pi*radius;
    printf("The area of a circle :-%f\n",area);
    printf("The diameter of a Circle :-%f\n",diameter);
    printf("The Circumference of a Circle :- %f\n",circumference);
getch();
}
 

Output :-