function value = r8vec_dif_f ( x )

%*****************************************************************************80
%
%% r8vec_dif_f() evaluates the function used in r8vec_dif_test().
%
%  Licensing:
%
%    This code is distributed under the MIT license.
%
%  Modified:
%
%    19 April 2009
%
%  Author:
%
%    John Burkardt
%
  value = exp ( x );

  return
end
