This documentation is copyright © 1998-2001 Sandro Sigala <sandro@sigala.it>.
All rights reserved.

Released under the GNU General Public License.

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The ISO C <ctype.h> Header

Click here for a summary of the <ctype.h> header.

Functions

isalnumCheck if a character is an alphabetic or a digit character
isalphaCheck if a character is an alphabetic character
iscntrlCheck if a character is a control character
isdigitCheck if a character is a digit
isgraphCheck if a character is a graphic character
islowerCheck if a character is a lowercase character
isprintCheck if a character is a printable character
ispunctCheck if a character is a punctuation character
isspaceCheck if a character is a space character
isupperCheck if a character is an uppercase character
isxdigitCheck if a character is an hexadecimal digit
tolowerConvert a character to a lowercase character
toupperConvert a character to an uppercase character