using System;

​

class RectangleCalculator

{

    static void Main()

    {

        double width = GetRectangleDimension("Enter the width of the rectangle: ");

        double height = GetRectangleDimension("Enter the height of the rectangle: ");

​

        double area = CalculateArea(width, height);

        double perimeter = CalculatePerimeter(width, height);

​

        DisplayResults(width, height, area, perimeter);

    }

​

    static double GetRectangleDimension(string prompt)

    {

        Console.Write(prompt);

        string input = Console.ReadLine();

​

        if (double.TryParse(input, out double dimension) && dimension > 0)

        {

            return dimension;

        }

        else

        {

            Console.WriteLine("Invalid input. Please enter a valid positive number.");

            return GetRectangleDimension(prompt); // Recursively ask for input until it's valid.

        }

    }

​

    static double CalculateArea(double width, double height)

    {

        return width * height;

    }

​

    static double CalculatePerimeter(double width, double height)

    {

        return 2 * (width + height);

    }

​

    static void DisplayResults(double width, double height, double area, double perimeter)

    {

        Console.WriteLine("\nRectangle Details:");

        Console.WriteLine("------------------");

        Console.WriteLine($"Width: {width:F2}");

        Console.WriteLine($"Height: {height:F2}");

        Console.WriteLine($"Area: {area:F2}");

        Console.WriteLine($"Perimeter: {perimeter:F2}");

    }

}

​

​