Función IsAlphabetic Ejercicio C# - Curso de Programación C# (C Sharp)

// Import the System namespace to use basic classes like Console
using System;

class Program
{
    // Main method to drive the program
    public static void Main()
    {
        // Test the IsAlphabetic function
        if (IsAlphabetic("a"))
        {
            Console.WriteLine("It is an alphabetic character");
        }
        else
        {
            Console.WriteLine("It is not an alphabetic character");
        }

        if (IsAlphabetic("1"))
        {
            Console.WriteLine("It is an alphabetic character");
        }
        else
        {
            Console.WriteLine("It is not an alphabetic character");
        }
    }

    // Function to check if a character is alphabetic
    public static bool IsAlphabetic(string str)
    {
        // Check if the string contains exactly one character and it is a letter
        return str.Length == 1 && char.IsLetter(str[0]);
    }
}