input: Write a function to compute the absolute difference between two given numbers and print it. Write the function and provide an example for the assert testing cases.
  
  def absolute_difference(A, B):
      return abs(A - B)
  
  assert absolute_difference(9, 5)==4
  assert absolute_difference(10, -10)==20
  assert absolute_difference(0, 0)==0
  assert absolute_difference(-9, -5)==4
  assert absolute_difference(1, 3)==2
output: def absolute_difference(A, B):
      return abs(A - B)