C# For Demo

using System;

namespace ConsoleForDemo
{
    /// 

    ///     C# For Demo.
    ///     https://www.cnblogs.com/LifeDecidesHappiness/p/15665536.html
    ///     LDH @ 2021-12-9
    /// 
    internal class Program
    {
        /// 

        ///     The end of the row.
        /// 
        public static int RowEnd = 5;

        /// 

        ///     The end of the column.
        /// 
        public static char ColumnEnd = 'e';

        private static void Main()
        {
            Console.Title = "C# For Demo";

            for (var row = 0; row <= RowEnd; row++)
            for (var column = 'a'; column <= ColumnEnd; column++)
                Console.WriteLine($"The cell is ({row}, {column})");

            Console.ReadKey();
        }
    }
}