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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 re-
     turns 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 ob-
     solete and	may not	be supported in	future releases.  The iswalnum() func-
     tion 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

NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUES | COMPATIBILITY | SEE ALSO | STANDARDS

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