ISALNUM(3) BSD Programmer's Manual ISALNUM(3)
isalnum - alphanumeric character test
#include <ctype.h> int isalnum(int c);
The isalnum() macro tests for any character for which isalpha(3) or isdigit(3) is true.
The isalnum() macro returns zero if the character tests false or non-zero if the character tests true.
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)
The isalnum() function conforms to ANSI X3.159-1989 ("ANSI C").
The argument to isalnum() must be EOF or representable as an unsigned char; otherwise, the result is undefined. MirOS BSD #10-current June 29, 1991 1
Generated on 2015-04-13 10:26:13 by $MirOS: src/scripts/roff2htm,v 1.80 2015/01/02 13:54:19 tg Exp $
These manual pages and other documentation are copyrighted by their respective writers;
their source is available at our CVSweb,
AnonCVS, and other mirrors. The rest is Copyright © 2002–2015 The MirOS Project, Germany.
This product includes material provided by Thorsten Glaser.
This manual page’s HTML representation is supposed to be valid XHTML/1.1; if not, please send a bug report – diffs preferred.