using System;

public class Program

{

    static void PrintChars(string s)

{

    Console.WriteLine($"\"{s}\".Length = {s.Length}");

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

    {

        Console.WriteLine($"s[{i}] = '{s[i]}' ('\\u{(int)s[i]:x4}')");

    }

    Console.WriteLine();

}

    public static void Main()

    {

        PrintChars("Hello World");

    }

}