#! /usr/bin/env python
#
def disk01_area ( ):

#*****************************************************************************80
#
## DISK01_AREA returns the area of the unit disk.
#
#  Licensing:
#
#    This code is distributed under the GNU LGPL license. 
#
#  Modified:
#
#    22 June 2015
#
#  Author:
#
#    John Burkardt
#
#  Parameters:
#
#    Output, real AREA, the area of the unit disk.
#
  import numpy as np

  r = 1.0
  value = np.pi * r * r

  return value

def disk01_area_test ( ) :

#*****************************************************************************80
#
## DISK01_AREA tests DISK01_AREA.
#
#  Licensing:
#
#    This code is distributed under the GNU LGPL license.
#
#  Modified:
#
#    22 June 2015
#
#  Author:
#
#    John Burkardt
#
  import platform

  print ( '' )
  print ( 'DISK01_AREA_TEST' )
  print ( '  Python version: %s' % ( platform.python_version ( ) ) )
  print ( '  DISK01_AREA returns the area of the unit disk.' )

  value = disk01_area ( )

  print ( '' )
  print ( '  DISK01_AREA() = %g' % ( value ) )
#
#  Terminate.
#
  print ( '' )
  print ( 'DISK01_AREA_TEST' )
  print ( '  Normal end of execution.' )
  return

if ( __name__ == '__main__' ):
  from timestamp import timestamp
  timestamp ( )
  disk01_area_test ( )
  timestamp ( )