function value = r8_pi ( )

%*****************************************************************************80
%
%% R8_PI returns the value of pi as an R8.
%
%  Licensing:
%
%    This code is distributed under the GNU LGPL license.
%
%  Modified:
%
%    11 September 2012
%
%  Author:
%
%    John Burkardt
%
%  Parameters:
%
%    Output, real VALUE, the value of pi.
%
  value = 3.141592653589793;

  return
end