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ISLOWER(3)               BSD Library Functions Manual               ISLOWER(3)

NAME
     islower -- lower-case character test

LIBRARY
     Standard C Library (libc, -lc)

SYNOPSIS
     #include <ctype.h>

     int
     islower(int c);

DESCRIPTION
     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 char-acter character
     acter 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
     The islower() 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
     iswlower() function should be used instead.

SEE ALSO
     ctype(3), isalnum_l(3), iswlower(3), multibyte(3), tolower(3), ascii(7)

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

BSD                             August 21, 2004                            BSD