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);

     int
     isalnum_l(int c, locale_t loc);

DESCRIPTION

     The isalnum() function tests for any character for which isalpha(3) or isdigit(3) is true.  The value of the argument must be representable
     as an unsigned char or the value of EOF.

     In the ASCII character set, this includes the following characters (with their numeric values shown in octal):

     060 ``0''	   061 ``1''	 062 ``2''     063 ``3''     064 ``4''
     065 ``5''	   066 ``6''	 067 ``7''     070 ``8''     071 ``9''
     101 ``A''	   102 ``B''	 103 ``C''     104 ``D''     105 ``E''
     106 ``F''	   107 ``G''	 110 ``H''     111 ``I''     112 ``J''
     113 ``K''	   114 ``L''	 115 ``M''     116 ``N''     117 ``O''
     120 ``P''	   121 ``Q''	 122 ``R''     123 ``S''     124 ``T''
     125 ``U''	   126 ``V''	 127 ``W''     130 ``X''     131 ``Y''
     132 ``Z''	   141 ``a''	 142 ``b''     143 ``c''     144 ``d''
     145 ``e''	   146 ``f''	 147 ``g''     150 ``h''     151 ``i''
     152 ``j''	   153 ``k''	 154 ``l''     155 ``m''     156 ``n''
     157 ``o''	   160 ``p''	 161 ``q''     162 ``r''     163 ``s''
     164 ``t''	   165 ``u''	 166 ``v''     167 ``w''     170 ``x''
     171 ``y''	   172 ``z''

     The isalnum_l() function takes an explicit locale argument, whereas the isalnum() function uses the current global or per-thread locale.

RETURN VALUES

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

COMPATIBILITY

     The 4.4BSD extension of accepting arguments outside of the range of the unsigned char type in locales with large character sets is considered
     obsolete and may not be supported in future releases.  The iswalnum() function should be used instead.

SEE ALSO

     ctype(3), isalpha(3), isdigit(3), iswalnum(3), xlocale(3), ascii(7)

STANDARDS

     The isalnum() function conforms to ISO/IEC 9899:1990 (``ISO C90'').  The isalnum_l() function conforms to IEEE Std 1003.1-2008 (``POSIX.1'').

BSD
								   July 17, 2005							       BSD