Double letters
Write a query that returns double letters sequence in format: AA AB AC ... ZX ZY ZZ
Expected input and output
(no input) → "AA AB AC ... AZ BA BB ... ZX ZY ZZ"
using System;
using System.Linq;
namespace CSharpExercises.Exercises.LINQ
{
class DoubleLettersTask
{
public static void Main()
{
var doubleLetters = Enumerable.Range((char)65, 26)
.SelectMany(x => Enumerable.Range((char)65, 26).Select(y => (char)x + "" + (char)y));
foreach (var doubleLetter in doubleLetters)
{
Console.Write(doubleLetter + " "); // AA AB AC ... AZ BA BB ... ZX ZY ZZ
}
}
}
}