C <ctype.h>

Last update on September 06 2023 12:38:08 (UTC/GMT +8 hours)

The ctype.h header file declares functions used in character classification. The ctype.h header file declares the following functions.

A complete table of ctype Lybrary:

Name	Description
isalnum() function	Test for an alphanumeric character.
isalpha() function	Test for an alphabetic character.
iscntrl() function	Test for a control character.
isdigit() function	Test for a decimal digit.
isgraph() function	Test for a visible character.
islower() function	Test for a lowercase letter.
isprint() function	Test for a printable character.
ispunct() function	Test for a punctuation character.
isspace() function	Test for a white-space character.
isupper() function	Test for an uppercase letter.
isxdigit() function	Test for a hexadecimal digit.
tolower() function	Transliterate uppercase characters to lowercase.
toupper()function	Transliterate lowercase characters to uppercase.

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