

   AAsskk ddaattaa ttoo bbee ttyyppeedd oonn tthhee kkeeyybbooaarrdd..

        ask(message="Type in datum")

   AArrgguummeennttss::

    message: a character value, normally something describing
             the required input

   DDeessccrriippttiioonn::

        This function prints a message and prompts the user to
        type in data on the keyboard.

   VVaalluuee::

        the object typed in.

   EExxaammpplleess::

        n <- ask("sample size")
        nv <- ask("vector of sample sizes")
        # in the second case, the user could reply eg with `c(5,10,30)'

