Basic_Task8

using System;

namespace Basic_Task8
{
    class Program
    {
        static void Main(string[] args)
        {
            int i = 7;
            while (i <= 100)
            {
                Console.Write(i + " ");
                i += 7;
            }

            Console.WriteLine();
            for (i = 7; i<=100; i = i+7)
            {
                Console.Write(i + " ");
            }

            i = 7;
            Console.WriteLine();
            do
            {
                Console.Write(i + " ");
                i += 7;
            }
            while (i <= 100);
        }
    }
}