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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 ob-
     solete and	may not	be supported in	future releases.  The towlower() func-
     tion 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
NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUES | COMPATIBILITY | SEE ALSO | STANDARDS

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