[Haskell-beginners] Is there any pydoc or perldoc like for Haskell?

Python has the pydoc command to get help for builtins and modules, eg. "pydoc def" or "pydoc itertools" Perl has a similar facility with the perldoc, eg. "perldoc -tf substr" Is there such a thing available for Haskell? I have been consulting http://www.haskell.org/hoogle/ but it isn't as practical as having help available at the prompt (although very useful, though). thanks in advance.