_ttoolloowweerr() -- ctype Function (libc)

Convert characters to lower case
#iinncclluuddee <ccttyyppee.hh>
iinntt _ttoolloowweerr(_c) iinntt _c;

The function _ttoolloowweerr() converts the character _c to lower case, and returns
the converted character.  Unlike the related function ttoolloowweerr(), _ttoolloowweerr()
is not guaranteed to work correctly if handed anything other than an upper-
case character, that is, a character for which iissuuppppeerr() returns true.

_S_e_e _A_l_s_o
lliibbcc, ttoolloowweerr(), _ttoouuppppeerr()

_N_o_t_e_s
_ttoolloowweerr() is not  part of the ANSI standard; COHERENT  includes it only to
support old code.  You should use ttoolloowweerr() instead.
