tolower man page on PC-BSD

tolower man page on PC-BSD

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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.	 The argument must be representable as an unsigned
     char or the value of EOF.

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 argu‐
     ment is returned unchanged.

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 towlower()
     function should be used instead.

SEE ALSO
     ctype(3), islower(3), towlower(3)

STANDARDS
     The tolower() function conforms to ISO/IEC 9899:1990 (“ISO C90”).

BSD				 July 25, 2010				   BSD

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