import java.util.Scanner; // program uses class Scanner

public class SCarroll_Assign3_28 {


    public static void main(String[] args) {

        Scanner input = new Scanner( System.in );

        int radius;
        int diameter;
        int area;

        System.out.print( "Enter number for the Radius. " );
        radius = input.nextInt();

        area = radius * radius;
        diameter = radius * 2;

        System.out.printf( "Diameter of the circle is %d\n", radius * 2 );

        System.out.printf( "Circumference of the circle is %f\n", Math.PI * diameter );

        System.out.printf( "Area of the circle is %f\n.", Math.PI * area );