isalnum(3) - NetBSD Manual Pages

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ISALNUM(3)                NetBSD Programmer's 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() macro tests for any character for which isalpha(3) or
     isdigit(3) is true.


RETURN VALUES

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


SEE ALSO

     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), toascii(3), tolower(3), toupper(3), stdio(3), ascii(7)


STANDARDS

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

NetBSD 1.5.2                     June 29, 1991                               1