function root_num = p11_root_num ( )

%*****************************************************************************80
%
%% P11_ROOT_NUM returns the number of known roots for problem 11.
%
%  Licensing:
%
%    This code is distributed under the GNU LGPL license.
%
%  Modified:
%
%    06 May 2011
%
%  Author:
%
%    John Burkardt
%
%  Parameters:
%
%    Output, integer ROOT_NUM, the number of known roots.
%
  root_num = 2;

  return
end