CTYPE(3) BSD Programmer's Manual CTYPE(3)
ctype - character classification macros
#include <ctype.h>
int
isalpha(int c);
int
isupper(int c);
int
islower(int c);
int
isdigit(int c);
int
isxdigit(int c);
int
isalnum(int c);
int
isspace(int c);
int
ispunct(int c);
int
isprint(int c);
int
isgraph(int c);
int
iscntrl(int c);
int
isblank(int c);
int
isascii(int c);
int
toupper(int c);
int
tolower(int c);
int
toascii(int c);
The above macros perform character tests and conversions on the integer
c.
See each function's own manual page for more information.
isalnum(3), isalpha(3), isascii(3), isblank(3), iscntrl(3), isdigit(3),
isgraph(3), islower(3), isprint(3), ispunct(3), isspace(3), isupper(3),
isxdigit(3), stdio(3), toascii(3), tolower(3), toupper(3), ascii(7)
These functions, with the exception of isblank() and toascii(), conform
to ANSI X3.159-1989 ("ANSI C").
MirOS BSD #10-current April 19, 1991 1
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