c# egor prac 4 num 3 var 11

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace egor_prac4_z3_var11
{
    class Program
    {
        static void Main(string[] args)
        {
            int a, b, x, y, i;
            Console.Write("from A to B which ends with X or Y\n\nEnter\nA = ");
            a = int.Parse(Console.ReadLine());
            Console.Write("B = ");
            b = int.Parse(Console.ReadLine());
            Console.Write("X = ");
            x = int.Parse(Console.ReadLine());
            Console.Write("Y = ");
            y = int.Parse(Console.ReadLine());

            Console.Write("\nfor:\n");
            for (i = a; i <= b; i++)
            {
                if (i % 10 == x || i % 10 == y)
                {
                    Console.Write(i + " ");
                }
            }

            Console.Write("\n\nwhile:\n");
            i = a;
            while(i <= b)
            {
                if (i % 10 == x || i % 10 == y)
                {
                    Console.Write(i + " ");
                }
                i++;
            }

            Console.Write("\n\ndo-while:\n");
            i = a;
            do
            {
                if (i % 10 == x || i % 10 == y)
                {
                    Console.Write(i + " ");
                }
            } while (i++ < b);

            Console.ReadKey();
        }
    }
}