using System;

public class Program

{

    public static void Main()

    {

    Console.WriteLine("what is your age?");

    double age = double.Parse(Console.ReadLine());

​

        if (age >= 30){

            Console.WriteLine("you are over 30 years old");

        }

        else if (age <=29 && age >=20){

            Console.WriteLine("you are between 20-29 years old");

        }

        else if( age <=19 && age>0){

            Console.WriteLine("you are between 1-20 years old");

        }

        else {

            Console.WriteLine("can you please enter you real age");

        }

    }}