function rule_num = tetrahedron_nco_rule_num ( )

%*****************************************************************************80
%
%% tetrahedron_nco_rule_num() returns the number of NCO rules available.
%
%  Licensing:
%
%    This code is distributed under the MIT license.
%
%  Modified:
%
%    31 January 2007
%
%  Author:
%
%    John Burkardt
%
%  Reference:
%
%    Peter Silvester,
%    Symmetric Quadrature Formulae for Simplexes,
%    Mathematics of Computation,
%    Volume 24, Number 109, January 1970, pages 95-100.
%
%  Output:
%
%    integer RULE_NUM, the number of rules available.
%
  rule_num = 7;

  return
end
