public class CalculateCircleAreaExample { public static void main(String[] args) { int radius = 3; System.out.println("The radius of the circle is " + radius); /* * Area of a circle is pi * r * r where r is a radius of a circle. */ // NOTE : use Math.PI constant to get value of pi double area = Math.PI * radius * radius; System.out.println("Area of a circle is " + area); }}
|
