/**
 * A utility class for calculating the perimeter of a square
 * using a recursive algorithm.
 */
public class Recursive
{
    /**
     * Find the perimeter of a square that has a given area
     *
     * @param area    The area of the square
     * @return        The perimtere of the square
     */
    public static double findPerimeterOfSquare(double area)
    {
       double        perimeter, width;
       
       width     = Math.sqrt(area);
       perimeter = increaseBy(0.0, width, 4);       

       return perimeter;       
    }

    /**
     * Increase a given total by a given amount a given number of times.
     *
     * @param total   The value to increase
     * @param amount  The amount of the increase
     * @param times   The number of times to perform the increase
     */
    private static double increaseBy(double total, double amount, int times)
    {
        if (times == 1)
        {
            return total + amount;            
        }
        else
        {
            return increaseBy(total + amount, amount, times - 1);
        }
    }
    
    
}