C# Calculate Perimeter of Circle and Rectangle

using System;

class Program
{
    public static void Main()
    {

        double l, w, r, per_rect, per_cir;
        double PI = 3.14;

        Console.WriteLine("Enter the Length and Width: ");

        l = Convert.ToDouble(Console.ReadLine());
        w = Convert.ToDouble(Console.ReadLine());
        per_rect = 2 * (l + w);

        Console.WriteLine("Enter the radius of the circle: ");
        r = Convert.ToDouble(Console.ReadLine());

        per_cir = 2 * PI * r;

        Console.WriteLine("Perimeter of Rectangle: {0}", per_rect);
        Console.WriteLine("Perimeter of Circle: {0}", per_cir);

        Console.Read();
    }
}

 

Output