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NetBSD 6.1.5 - man page for isalnum (netbsd section 3)

ISALNUM(3)			   BSD Library Functions Manual 		       ISALNUM(3)

NAME
     isalnum -- alphanumeric character test

LIBRARY
     Standard C Library (libc, -lc)

SYNOPSIS
     #include <ctype.h>

     int
     isalnum(int c);

DESCRIPTION
     The isalnum() function tests for any character for which isalpha(3) or isdigit(3) is true.

RETURN VALUES
     The isalnum() function returns zero if the character tests false and returns non-zero if the
     character tests true.

SEE ALSO
     ctype(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)

STANDARDS
     The isalnum() function conforms to ANSI X3.159-1989 (``ANSI C89'').

CAVEATS
     The argument to isalnum() must be EOF or representable as an unsigned char; otherwise, the
     behavior is undefined.  See the CAVEATS section of ctype(3) for more details.

BSD					  April 17, 2008				      BSD


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