Area/Circ

//**********************************************************
//  Circle.java
//
//  Print the area of a circle with two different radii
//**********************************************************

public class Circle
{
    public static void main(String[] args)
    {
        //final double PI = 3.14159;

        //declarations
        int radius = 10;
        int radius2 = 20;
        //calculations
        double area = Math.PI * radius * radius;

        double circ = Math.PI*2*radius;

        System.out.println("The area of a circle with radius " + radius +
                " is " + area);
        System.out.println("The circumference of a circle with radius " + radius +
                " is " + circ);

        //reassignment

        //calculations
        double area2 = Math.PI * radius2 * radius2;
        double circ2 = Math.PI*2*radius2;

        //outputs

        System.out.println("The area of a circle with radius " + radius2 +
                " is " + area2);
        System.out.println("The circumference of a circle with radius " + radius2 +
                " is " + circ2);

        double areaGrowthFactor=area2/area;
        double circGrowthFactor=circ2/circ;

        System.out.println("When the radius is doubled, area grows by a factor of: "+areaGrowthFactor);
        System.out.println("When the radius is doubled, circumference grows by a factor of: "+circGrowthFactor);


    }
}