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ISALPHA(3)	       FreeBSD Library Functions Manual		    ISALPHA(3)

NAME
     isalpha --	alphabetic character test

LIBRARY
     Standard C	Library	(libc, -lc)

SYNOPSIS
     #include <ctype.h>

     int
     isalpha(int c);

     int
     isalpha_l(int c, locale_t loc);

DESCRIPTION
     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_l() function takes an explicit	locale argument, whereas the
     isalpha() function	uses the current global	or per-thread locale.

RETURN VALUES
     The isalpha() 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	iswalpha()
     function should be	used instead.

SEE ALSO
     ctype(3), islower(3), isupper(3), iswalpha(3), xlocale(3),	ascii(7)

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

FreeBSD	10.1			 July 17, 2005			  FreeBSD 10.1

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

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