function neqn = p21_neqn ( )

%*****************************************************************************80
%
%% P21_NEQN returns the number of equations for problem P21.
%
%  Licensing:
%
%    This code is distributed under the GNU LGPL license.
%
%  Modified:
%
%    17 February 2013
%
%  Author:
%
%    John Burkardt
%
%  Parameters:
%
%    Output, integer NEQN, the number of equations.
%
  neqn = 2;

  return
end
