NAME
  CLS Statement

SYNOPSIS
  CLS [{0 | 1 | 2}]
      CLS      Clears either the text or graphics viewport. If a graphics
               viewport has been set (using VIEW), clears only the graphics
               viewport. Otherwise, clears the text viewport or entire screen.
      CLS 0    Clears the screen of all text and graphics.
      CLS 1    Clears the graphics viewport or the entire screen if no graphics
               viewport has been set.
      CLS 2    Clears the text viewport.

DESCRIPTION
  Clears the screen.

SEE ALSO
  none