function option_num = p13_option_num ( )

%*****************************************************************************80
%
%% p13_option_num() returns the number of options for problem 13.
%
%  Licensing:
%
%    This code is distributed under the MIT license.
%
%  Modified:
%
%    03 September 2008
%
%  Author:
%
%    John Burkardt
%
%  Output:
%
%    integer OPTION_num, the number of options.
%
  option_num = 6;

  return
end
