function problem_num = p00_problem_num ( )

%*****************************************************************************80
%
%% P00_PROBLEM_NUM returns the number of problems available.
%
%  Licensing:
%
%    This code is distributed under the MIT license.
%
%  Modified:
%
%    10 October 2020
%
%  Author:
%
%    John Burkardt
%
%  Output:
%
%    integer PROBLEM_NUM, the number of problems available.
%
  problem_num = 23;

  return
end
