code: def indexOfClosest( arr, val ):
      '''Return the index in arr of the closest float value to val.'''
      i_closest = None
      for i,v in enumerate(arr):
          d = math.fabs( v - val )
          if i_closest == None or d < d_closest:
              i_closest = i
              d_closest = d
      return i_closesf indexOfClosest( arr, val ):
      '''Return the index in arr of the closest float value to val.'''
      i_closest = None
      for i,v in enumerate(arr):
          d = math.fabs( v - val )
          if i_closest == None or d < d_closest:
              i_closest = i
              d_closest = d
      return i_closest
docs: Return the index in arr of the closest float value to val.