#!/usr/bin/env python

def r8_round ( x ):

#*****************************************************************************80
#
## R8_ROUND sets an R8 to the nearest integral value.
#
#  Example:
#
#        X        R8_ROUND
#
#      1.3         1.0
#      1.4         1.0
#      1.5         1.0 or 2.0
#      1.6         2.0
#      0.0         0.0
#     -0.7        -1.0
#     -1.1        -1.0
#     -1.6        -2.0
#
#  Licensing:
#
#    This code is distributed under the GNU LGPL license.
#
#  Modified:
#
#    25 July 2014
#
#  Author:
#
#    John Burkardt
#
#  Parameters:
#
#    Input, real X, the value.
#
#    Output, real R8_ROUND, the rounded value.
#
  from math import floor

  if ( x < 0.0 ):
    value = - floor ( - x + 0.5 )
  else:
    value =   floor ( + x + 0.5 )

  return value