1 '\" te
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   6 .TH TOLOWER 3C "Aug 14, 2002"
   7 .SH NAME
   8 tolower \- transliterate upper-case characters to lower-case
   9 .SH SYNOPSIS
  10 .LP
  11 .nf
  12 #include <ctype.h>
  13 
  14 \fBint\fR \fBtolower\fR(\fBint\fR \fIc\fR);
  15 .fi
  16 
  17 .SH DESCRIPTION
  18 .sp
  19 .LP
  20 The \fBtolower()\fR function has as a domain a type \fBint\fR, the value of
  21 which is representable as an \fBunsigned char\fR or the value of \fBEOF\fR. If
  22 the argument has any other value, the argument is returned unchanged. If the
  23 argument of \fBtolower()\fR represents an upper-case letter, and there exists a
  24 corresponding lower-case letter (as defined by character type information in
  25 the program locale category \fB\fR\fBLC_CTYPE\fR\fB),  \fR the result is the
  26 corresponding lower-case letter. All other arguments in the domain are returned
  27 unchanged.
  28 .SH RETURN VALUES
  29 .sp
  30 .LP
  31 On successful completion, \fBtolower()\fR returns the lower-case letter
  32 corresponding to the argument passed. Otherwise, it returns the argument
  33 unchanged.
  34 .SH ERRORS
  35 .sp
  36 .LP
  37 No errors are defined.
  38 .SH ATTRIBUTES
  39 .sp
  40 .LP
  41 See \fBattributes\fR(5) for descriptions of the following attributes:
  42 .sp
  43 
  44 .sp
  45 .TS
  46 box;
  47 c | c
  48 l | l .
  49 ATTRIBUTE TYPE  ATTRIBUTE VALUE
  50 _
  51 CSI     Enabled
  52 _
  53 Interface Stability     Standard
  54 _
  55 MT-Level        MT-Safe
  56 .TE
  57 
  58 .SH SEE ALSO
  59 .sp
  60 .LP
  61 \fB_tolower\fR(3C), \fBsetlocale\fR(3C), \fBattributes\fR(5),
  62 \fBstandards\fR(5)