task1

using System;

public class Program
{
    public static void Main()
    {
     Console.WriteLine("Please enter number");
     int num = Convert.ToInt32(Console.ReadLine());
     int i = 0;
     if (num < 1)
     {
         Console.WriteLine("Please enter a number greater than 1!");
     }
    else
    {
        while (i<=num)
        {
        Console.WriteLine(i);
          i++;
        }
    }
        }
    }