function prob_num = get_prob_num ( )

%*****************************************************************************80
%
%% get_prob_num() returns the number of test integration problems.
%
%  Licensing:
%
%    This code is distributed under the MIT license.
%
%  Modified:
%
%    09 April 2007
%
%  Author:
%
%    John Burkardt
%
%  Output:
%
%    integer PROB_NUM, the number of problems.
%
  prob_num = 22;

  return
end
