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ISALPHA(3)		 BSD Library Functions Manual		    ISALPHA(3)

     isalpha — alphabetic character test

     Standard C Library (libc, -lc)

     #include <ctype.h>

     isalpha(int c);

     The isalpha() function tests for any character for which isupper(3) or
     islower(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):

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

     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 iswalpha()
     function should be used instead.

     ctype(3), islower(3), isupper(3), iswalpha(3), ascii(7)

     The isalpha() function conforms to ISO/IEC 9899:1990 (“ISO C90”).

BSD				 July 17, 2005				   BSD

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