DragonFly On-Line Manual Pages

ISALNUM(3)	      DragonFly 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.  For single C chars locales the value of the argument
     is 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''

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), isdigit(3), ascii(7)

STANDARDS
     The isalnum() function conforms to ISO/IEC 9899:1990 (``ISO C90'').

DragonFly 3.5			 June 4, 1993			 DragonFly 3.5