isalnum(3) - NetBSD Manual Pages

Command: Section: Arch: Collection:  
ISALNUM(3)              NetBSD 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. NetBSD 9.99 April 17, 2008 NetBSD 9.99
Powered by man-cgi (2021-06-01). Maintained for NetBSD by Kimmo Suominen. Based on man-cgi by Panagiotis Christias.