The C character set
A character denotes any alphabet, digit, or special symbol used to represent information. White space are prohibited between the character of keywords and identifiers.
(a) Alphabets Letters ---Upper case letters (A to Z)
Lower case letters (a to z)
(b) Digits Decimal digits (0 to 9)
(c) Special characters
|
Special Characters
|
|
,
|
Comma
|
.
|
Dot
|
|
;
|
Semicolon
|
:
|
Colon
|
|
?
|
Question Mark
|
'
|
Apostrophe
|
|
"
|
Quotation Mark
|
!
|
Exclamation Mark
|
|
|
|
Vertical Bar
|
/
|
Slash
|
|
\
|
Back Slash
|
~
|
Tilde
|
|
_
|
Under Score
|
$
|
Dollar
|
|
%
|
Percent
|
#
|
Pound/Hass/Number Sign
|
|
&
|
Ampersand
|
^
|
Caret
|
|
*
|
Asterisk
|
-
|
Minus
|
|
+
|
Plus
|
<
|
Less Than
|
|
>
|
Greater Than
|
( )
|
Parenthesis Left/Right
|
|
[ ]
|
Bracket Left/Right
|
{ }
|
Curly Braces Left/Right
|
|
|
|
|
|
(d)White spaces
Blank space
Horizontal tab
Carriage return
New line
Form feed
(e) Trigraph characters:
These are group of three characters. First two are (??) and last is a 'C' character. The trigraph
character provides a way to enter certain character that is not available on some keyboard.
|
Trigraph Sequence
|
Translation
|
|
??=
|
#(number sign)
|
|
??(
|
[ (Left Bracket)
|
|
??)
|
] (Right Bracket)
|
|
??<
|
{ (Left Brace)
|
|
??>
|
} (Right Brace)
|
|
??!
|
|(Vertical Bar)
|
|
??/
|
\ (Back Slash)
|
|
??-
|
~(Caret)
|
|
??'
|
^ (Tilde)
|