

   PPrroodduucctt ooff VVeeccttoorr EElleemmeennttss

        prod(..., na.rm=TRUE)

   DDeessccrriippttiioonn::

        `prod' returns the product of all the values present in
        its arguments.  If `na.rm' is `FALSE' an `NA' value in
        any of the arguments will cause a value of `NA' to be
        returned, otherwise `NA' values are ignored.

   SSeeee AAllssoo::

        `sum', `cumprod', `cumsum'.

   EExxaammpplleess::

        print(prod(1:7)) == print(gamma(8))

