11. Write a Java program that calculates the circumference length and area of the RADIUS 3.0 and outputs the result. The pi is defined as a constant, the radius is defined as a variable, then calculated and the result is output.

Package Com.hanqi.yzljs;

public class Yzljs
{

public static void Main (string[] args)
{
Final double PI = 3.1415926;
Double r = 3.0;
Double C =2*pi*r;
Double s = pi*r*r;
System.out.println ("circumference of the circle =" +c+ "area of the Circle =" +s ");

}

}

The circumference of a circle =18.849555600000002 the area of a circle =28.274333400000003

11. Write a Java program that calculates the circumference length and area of the RADIUS 3.0 and outputs the result. The pi is defined as a constant, the radius is defined as a variable, then calculated and the result is output.