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NetBSD 6.1.5 - man page for tolower (netbsd section 3)

TOLOWER(3)			   BSD Library Functions Manual 		       TOLOWER(3)

NAME
     tolower -- upper case to lower case letter conversion

LIBRARY
     Standard C Library (libc, -lc)

SYNOPSIS
     #include <ctype.h>

     int
     tolower(int c);

DESCRIPTION
     The tolower() function converts an upper-case letter to the corresponding lower-case letter.

RETURN VALUES
     If the argument is an upper-case letter, the tolower() function returns the corresponding
     lower-case letter if there is one; otherwise the argument is returned unchanged.

SEE ALSO
     ctype(3), isalnum(3), isalpha(3), isascii(3), iscntrl(3), isdigit(3), isgraph(3),
     islower(3), isprint(3), ispunct(3), isspace(3), isupper(3), isxdigit(3), stdio(3),
     toascii(3), toupper(3), ascii(7)

STANDARDS
     The tolower() function conforms to ANSI X3.159-1989 (``ANSI C89'').

CAVEATS
     The argument to tolower() must be EOF or representable as an unsigned char; otherwise, the
     behavior is undefined.  See the CAVEATS section of ctype(3) for more details.

BSD					  April 17, 2008				      BSD


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