% -*- texinfo -*-
% @deftypefn {Function File} {} factorial (@var{n})
% Return the factorial of @var{n} where @var{n} is a positive integer. If
% @var{n} is a scalar, this is equivalent to @code{prod (1:@var{n})}. For
% vector or matrix arguments, return the factorial of each element in the
% array. For non-integers see the generalized factorial function
% @code{gamma}.
% @seealso{prod, gamma}
% @end deftypefn