function value = r8_exponential_01_sample ( )

%*****************************************************************************80
%
%% r8_exponential_01_sample() samples the standard exponential PDF.
%
%  Licensing:
%
%    This code is distributed under the MIT license.
%
%  Modified:
%
%    25 June 2013
%
%  Author:
%
%    John Burkardt
%
%  Output:
%
%    real VALUE, a sample of the PDF.
%
  r = r8_uniform_01_sample ( );

  value = - log ( r );

  return
end
