7.4.6
Character classification functions
Character classification functions are as follows.
Table 7.8 | Character Classification Functions |
|
|
isalnum
|
Identification of ASCII letter or numeral
|
isalpha
|
Identification of ASCII letter
|
isascii
|
Identification of ASCII code
|
isupper
|
Identification of upper-case character
|
islower
|
Identification of lower-case character
|
isdigit
|
Identification of decimal number
|
isxdigit
|
Identification of hexadecimal number
|
iscntrl
|
Identification of control character
|
ispunct
|
Identification of delimiter character
|
isspace
|
Identification of space/tab/carriage return/line feed/vertical tab/page feed
|
isprint
|
Identification of display character
|
isgraph
|
Identification of display character other than space
|