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 GNU LGPL license.
%
%  Modified:
%
%    19 April 2009
%
%  Author:
%
%    John Burkardt
%
  value = exp ( x );

  return
end
