C program to calculate area and circumference of circleC program to calculate area and circumference of circle

C program to calculate area and circumference of circle

Output:

Enter the radius of the circle: 2
The Area of Circle with radius 2.000000 is 12.560000

The Circumference of Circle with radius 2.000000 is 12.560000

Implementation:

#include <stdio.h> int main(void) { float radius,circumference,area; printf("Enter the radius of the circle:\n"); scanf("%f",&radius); /* calculating area of the circle area = pi * r * r where , pi -> a constant with value of 3.14 or 22/7 r -> radius of the circle */ area = 3.14 * radius * radius; /* calculating circumference of the circle circumference = 2 * pi * r where , pi -> a constant with value of 3.14 or 22/7 r -> radius of the circle */ circumference = 2 * 3.14 * radius; printf("The Area of Circle with radius %f is %f\n\n",radius,area); printf("The Circumference of Circle with radius %f is %f",radius,area); return 0; }