function root_num = p18_root_num ( )

%*****************************************************************************80
%
%% P18_ROOT_NUM returns the number of known roots for problem 18.
%
%  Licensing:
%
%    This code is distributed under the MIT license.
%
%  Modified:
%
%    04 October 2011
%
%  Author:
%
%    John Burkardt
%
%  Output:
%
%    integer ROOT_NUM, the number of known roots.
%
  root_num = 1;

  return
end
