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C# Constants

• Integer   1, 2, 4, or 8 bytes (4 bytes is default).

  No commas are allowed in an integer constant.

  Examples: 34, -13, 0, 234323, -85743

• Floating Point   4 or 8 bytes (8 bytes is default).
   
  

  No commas are allowed in a floating point constant.

  Examples: 3.043, -12.32, 0.00032, 5.98E+24, 9.11E-31

• Character   2 bytes (a single Unicode character).
   
  
  Character constants include all of the characters found on standard English keyboards.
   
  Examples: 'A'   'f'   '5'   '$'   ' ' (space).

  Some nonprintable characters are represented as escape sequences:

  '\''	Single Quote
  '\"'	Double Quote
  '\\'	Backslash
  '\a'	Audible Bell
  '\b'	Backspace
  '\f'	Form Feed
  '\n'	Line Feed
  '\r'	Carriage Return
  '\t'	Tab
  '\0'	Null Character
  '\xhh'	ASCII Character in Hex Notation
  '\xhhhh'	Unicode Character in Hex Notation

  
  
• String   Any length up to 2 billion bytes. Fixed length strings are not allowed in C#.
   
  
  Examples: "apple", "23543", "&%^*&@!", " " (space), "Hello\r\n" (string with embedded escape characters), ""
  (null character of length 0).
   
  To define a string where each backslash means a literal backslash, rather than the start of an escape sequence:
  fileName = @"c:\a.txt";
  
  
• Boolean   1 byte.
   
  
  Values: true, false
  
  
• Use constant suffixes to control the size of primitive constants:
   
  

  10000000000L	long
  5.27F	float
  5.27M	decimal