what is the purpose of Specific line in the Code

Question

i am reading a book named "Visual C# 2012 Programming" and i came up with following code :

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Ch05StringManupulationEx
{
    class Program
    {
        static void Main(string[] args)
        {
            string myString = "String with small s";
           char[] myChar = myString.ToCharArray();

            foreach (char whatever in myString)
            {
                Console.WriteLine("{0}", whatever);                
            }
            Console.Write("\nyou have entered {0} characters in String ",myString.Length);
            Console.ReadKey();
        }
    }
}

i don't know what the aurthor is doing on line : char[] myChar = myString.ToCharArray(); because he is not using the variable named myChar anywhere in the code and even though i commented the line and compiled the program the output is same, can any one explain what is the purpose of this line in this code ?

Answer 1

Probably they forgot to remove that line or show what does it do, It's an array of character, A string is full of characters, each letter of a string is a character, you can access any of these arrays by using a zero based numbers, for example:

string a = "Hello";

// Prints e
Console.WriteLine(a[2]);

You can change this line to myChar to understand, It's same to an array of string, Which means a string is an array of chars, here's the example:

foreach (char whatever in myChar)
{
    Console.WriteLine("{0}", whatever);                
}