C Programming

# C- Read Radius of Circle, Calculate Area and Circumference

Write a c program to read radius of a circle and calculate area and circumference. **The value of PI : 3.14159**

## C Code

#include <stdio.h>

#include <conio.h>

#include <math.h>

void main()

{

float r, a, c;

printf("nEnter radius of a circle:");

scanf("%f",&r);

a = M_PI*r*r;

c = 2*M_PI*r;

printf("nArea of cicle = %f",a);

printf("nCircumference of circle = %f",c);

getch();

}