ISLOWER(3) BSD Library Functions Manual ISLOWER(3)NAMEislower — 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 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
The islower() function returns zero if the character tests false and
returns non-zero if the character tests true.
SEE ALSOctype(3), tolower(3), ascii(7)STANDARDS
The islower() function conforms to ISO/IEC 9899:1990 (“ISO C90”).
BSD June 4, 1993 BSD
