NAME    [Toc]    [Back]

     islower -- lower-case character test

LIBRARY    [Toc]    [Back]

     Standard C Library (libc, -lc)

SYNOPSIS    [Toc]    [Back]

     #include <ctype.h>

     int
     islower(int c);

DESCRIPTION    [Toc]    [Back]

     The islower() function tests for any lower-case letters.  For single C
     chars locales (see multibyte(3)) 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):

     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    [Toc]    [Back]

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

COMPATIBILITY    [Toc]    [Back]

     Although islower() accepts arguments outside of the range of the unsigned
     char type in locales with large character sets, this is a 4.4BSD extension
 and the iswlower() function should be used instead for maximum
     portability.

SEE ALSO    [Toc]    [Back]

     ctype(3), iswlower(3), multibyte(3), tolower(3), ascii(7)

STANDARDS    [Toc]    [Back]

     The islower() function conforms to ISO/IEC 9899:1990 (``ISO C89'').


FreeBSD 5.2.1			October 6, 2002 		 FreeBSD 5.2.1