2nd

using System;

namespace WHILE_OneToHundred
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("Enter a number in the range [1...100]: ");
            int num = int.Parse(Console.ReadLine());


            while (num < 1 || num > 100)
            {
                Console.WriteLine("Invalid number!");
                Console.WriteLine("Enter a number in the range [1...100]: ");
                Console.ReadLine();
            }

            Console.WriteLine("The number is: {0}", num);
        }
    }
}