input: Write a function to compute the absolute difference between two given numbers A and B. The function should return the absolute value of the difference.
  
  def absolute_difference(A, B):
      return abs(A - B)
  
  assert absolute_difference(9, 5) == 4
  assert absolute_difference(-9, 5) == 14
  assert absolute_difference(5, 9) == 4
  assert absolute_difference(-9, -5) == 4
  assert absolute_difference(0, 0) == 0
output: def absolute_difference(A, B):
      return abs(A - B)