using System;   

    public class Program

    {

        public static void Main(string[] args)

        {

          Console.WriteLine("Welcome to the Caesarian Cipher program");

          Console.WriteLine("Please, enter a word.");

          string word = Console.ReadLine();

          char[] letters = word.ToCharArray(); //chops the string up into individual characters.

          // For            

          for(int i = 0; i < letters.Length; i++)

          {

                var charAsInt=(int)letters[i];

                var newChar= (char)(charAsInt+3);

                Console.Write(newChar);

          }

          Console.WriteLine("\n---------------------------");

​

          // ForEach            

          foreach(char letter in letters)

          {

              var charAsInt=(int)letter;

              var newChar= (char)(charAsInt+3);

              Console.Write(newChar);

          }

        }

    }

​

// Read this Q/A: https://stackoverflow.com/questions/48483385/incrementing-a-character-in-a-foreach-loop/48483464#48483464