lispdoc - results for clear-input

(clear-input &optional (stream *standard-input*))
Undocumented
 Mentioned in:
CLtL2 - 22.2.1. Input from Character Streams
HyperSpec - Function CLEAR-INPUT
Successful Lisp - chapter19
(trivial-gray-streams:stream-clear-input stream)
Function: This is like CL:CLEAR-INPUT, but for Gray streams, returning NIL. The default method does nothing.
  
(clear-output &optional (stream *standard-output*))
Undocumented
 Mentioned in:
CLtL2 - 22.3.1. Output to Character Streams
HyperSpec - Function FINISH-OUTPUT, FORCE-OUTPUT, CLEAR-OUTPUT
Successful Lisp - chapter19