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ISALNUM(3)                  BSD Programmer's Manual                 ISALNUM(3)

NAME
     isalnum - alphanumeric character test

SYNOPSIS
     #include <&lt;ctype.h>&gt;

     int
     isalnum(int c);

DESCRIPTION
     The isalnum() function tests for any character for which isalpha(3) or
     isdigit(3) is true.  In the ASCII character set, this includes the fol-
     lowing characters:


     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 re-
     turns non-zero if the character tests true.

SEE ALSO
     ctype(3),  ascii(7)

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

4.4BSD                           June 4, 1993                                1