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Character (character)Locate this document in the navigation structure

Use

A character ( character) is an element of a character string or keyword.

Structure
				
<character>::=
  <digit>
| <letter>
| <extended_letter>
| <hex_digit>
| <language_specific_character>
| <special_character>

Digits 

					
<digit>::=
  0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9

Letters 

					
<letter>::=
  A | B | C | D | E | F | G | H | I | J | K | L | M
| N | O | P | Q | R | S | T | U | V | W | X | Y | Z
| a | b | c | d | e | f | g | h | i | j | k | l | m
| n | o | p | q | r | s | t | u | v | w | x | y | z

Further letters 

					
<extended_letter>::=
  # | @ | $

Hexadecimal characters 

					
<hex_digit>::=
  0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9
| A | B | C | D | E | F
| a | b | c | d | e | f

Language-Specific Characters

A language-specific character ( language_specific_character) is any letter that occurs in a northern, southern, or central European language and is not contained in the list of letters.

Example

German umlauts: ä, ö, ü

French letters with a grave accent: →

If you have installed a UNICODE-enabled database, a language-specific character is a character that is not included in the ASCII code list from 0 to 127.

Special Characters

A special_character is any character that is not contained in the following list:

  • Digits

  • Letters

  • Further letters

  • Hexadecimal characters

  • Language-specific characters

  • Characters that indicate the end of a line in a file

More Information