Zavushchak_HW1

using System;


namespace HW1
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("Ener side of the square:");
            double a = Convert.ToInt32(Console.ReadLine());
            Console.WriteLine("perimeter of a square");
            double P = a * 4;
            Console.WriteLine(P);
            Console.WriteLine("area of a square");
            double S = Math.Pow(a, 2);
            Console.WriteLine(S);
            /////////////////////////////////////////////////////////
        
            int age;
            string name;
            Console.WriteLine("What is your name?");
            name = Console.ReadLine();
            Console.WriteLine("How old are you " + "," + " " + name);
            age = Convert.ToInt32(Console.ReadLine());
            Console.WriteLine(name + " " + age);
            ///////////////////////////////////////////////////////////////////////

            Console.WriteLine("Enter radius :");
            double r = Convert.ToInt32(Console.ReadLine());
            double l = 2 * Math.PI * r;
            Console.WriteLine("l=" + l);
            double s = Math.PI * Math.Pow(r, 2);
            Console.WriteLine("s=" + s);
            double v = (4 / 3) * Math.PI * Math.Pow(r, 3);
            Console.WriteLine("v=" + v);
        }
    }
}