nl()
Class Public methods
Enable the underlying display device to translate the return key into
newline on input, and whether it translates newline into return and
line-feed on output (in either case, the call ::addch('n') does the
equivalent of return and line feed on the virtual screen).
Initially, these translations do occur. If you disable them using ::nonl, curses will be able to make
better use of the line-feed capability, resulting in faster cursor motion.
Also, curses will