import java.util.Scanner;

/**
 Program to compute area of a circle.
 Author: Jane Q. Programmer.
 E-mail Address: janeq@somemachine.etc.etc.
 Programming Assignment 2.
 Last Changed: October 7, 2008.
*/

public class CircleCalculation
{
    public static void main(String[] args)
    {
        double radius; //in inches
        double area;   //in square inches
        Scanner keyboard = new Scanner(System.in);

        System.out.println("Enter the radius of a circle in inches:");
        radius = keyboard.nextDouble( );
        area = 3.14159 * radius * radius;
        System.out.println("A circle of radius " + radius + " inches");
        System.out.println("has an area of " + area + " square inches.");
    }
}