Character to string . confused

Question

I'm currently learning C#.

a little bit confused about convertion

especially converting character to string;

The code isn't working.

this line : Console.WriteLine(Char.ToString(i));

is converting a character to string possible? i just used character because its a letter choices. if i use a string it will be easy for me.

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

namespace SwitchStatement.Example
{
class SwitchSt
{
    static void Main()
    {
        char i;
        Console.WriteLine("Who is the current President of the United States?");
        Console.WriteLine("\nA.) Barack Obama\n" 
                       +  "B.) George Bush\n"
                       +  "C.) Bill Gates\n"
                       );

        Console.Write("Type the letter of your answer : ");
        Console.ReadLine(Char.ToString(i));
        switch(i)
        {
            case 'a' :
                     break;
        }

        Console.ReadKey();
    }
}
}

Answer 1

The problem is that you'll need to assign or prompt the user for the char before displaying it. You'll receive the error:

Use of unassigned local variable 'i'

In addition to static Char.ToString(ch), it is more common to convert a char to a String, using the variable instance i.

Console.WriteLine(i.ToString());

However, there is also an overload of WriteLine which takes a char directly:

Console.WriteLine(i);

Which IMO would be preferable as it has the least ceremony surrounding the char.

Edit

Use one of the Console.Read* methods to read the char. Here's Console.Read. Note that as Read returns an int, you'll need to cast to a char.

Console.Write("Type the letter of your answer : ");
char i = (char)Console.Read();
Console.WriteLine(i);

Final point - many will find the use of i for a char surprising, as i,j + k are typically used for integers, especially counters. Possibly rename char i to char ch or similar?

Answer 2

you can simply use a pre-defined method ToString() for this , like this example below ;

char ch = 'a';   

Console.WriteLine(ch.ToString());       // Output: "a"

To read input char

Console.Write("Enter a alphabet: ");
char a = (char)Console.Read();
  Console.Write("Enter your age: ");
  age = Convert.ToInt32(Console.ReadLine());
 //Show the details you typed
        Console.WriteLine("your letter is {0}.", a.ToString());
        Console.WriteLine("Age is {0}.", age);