Area-of-Circle

C Program to find Area of a Circle

In geometry, the area enclosed by a circle of radius r is πr2. Here the Greek letter π represents a constant, approximately equal to 3.14159, which is equal to the ratio of the circumference of any circle to its diameter.

#include<stdio.h> #include<conio.h> void main() {     float radius,area,pi=3.14;     clrscr();       printf("Enter the Radius of a Circle : ");     scanf("%f",&radius);       area = pi*radius*radius;       printf("Area of Circle is: %f",area);     getch(); }

 OUTPUT:

Enter the Radius of a Circle : 2
Area of Circle is: 12.560000