C Program to find area and circumference of circle
#include<stdio.h> int main() { int rad; float PI=3.14,area,ci; printf("nEnter radius of circle: "); scanf("%d",&rad); area = PI * rad * rad; printf("nArea of circle : %f ",area); ci = 2 * PI * rad; printf("nCircumference : %f ",ci); return(0); }
Output :
Enter radius of a circle : 1 Area of circle : 3.14 Circumference : 6.28
Explanation of Program :
In this program we have to calculate the area and circumference of the circle. We have following 2 formulas for finding circumference and area of circle.
Area of Circle = PI * R * R
and
Circumference of Circle = 2 * PI * R
In the above program we have declared the floating point variable PI whose value is defaulted to 3.14.We are accepting the radius from user.
printf("nEnter radius of circle: ");