• We use console to read information from the command line
• We can read: Characters, Strings, Numeral types(after conversion)
• To read from the console we use the methods Console.Read() and Console.ReadLine()

Console.ReadKey()

• Waits until a combination of keys is pressed. Reads a single character from console or a combination of keys
• Returns a result of type ConsoleKeyInfo
  • KeyChar – holds the entered character
  • Modifiers – holds the state of [Ctrl], [Alt],…

ConsoleKeyInfo key = Console.ReadKey();
Console.WriteLine();
Console.WriteLine("Character entered: " + key.KeyChar);
Console.WriteLine("Special keys: " + key.Modifiers);

Console.ReadLine()

• Gets a line of characters.
• Returns a string value.
• Returns null if the end of the input is reached.


Console.Write("Please enter your first name: ");
string firstName = Console.ReadLine();

Console.Write(„Please enter your last name: „);
string lastName = Console.ReadLine();

Console.WriteLine(„Hello, {0}{1}!“, firstName, lastName);
Reading Numeral Types

• Numeral types can not be read directly from the console
• To read a numeral type do the following:
  1. Read a string value
  2. Convert(parse) it to the required numeral type
• int.Parse(string)
  Parses(converts) a string to int
  string str = Console.ReadLine()
  int number = int.Parse(str);

  Console.WriteLine("You entered: {0}", number);


• {index[, alignment][:formatString]}

  Примери: {0,7} – Означава този аргумент да бъде вкаран 7 позиции на екрана. Ако числото е 25, това означава 5 интервала следвано от 25. Ако искаме да отпечатаме стринг „Били“ ще получим Били + 3 интервала, защото стринговете по подразбиране се подравняват в ляво.

• index
  • The zero-based index of the argument whose string representation is to be included at this position in the string.
• alignment
  • A signed integer that indicates the total length of the field into which the argument is inserted.
    - a positive integer – right-aligned
    - a negative integer – left-aligned

Източник: http://academy.telerik.com/academy-courses/csharp-programming-fundamentals/video

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Among the special characters is also a Unicode character notation for writing any character.

Escape characters can be ignored by adding an “@” symbol before the string. This is called a verbatim string and can for example be used to make file paths more readable.

string e = "c:\\Windows\\System32\\cmd.exe"; 
string f = @"c:\Windows\System32\cmd.exe";