input: Write a function to print the absolute difference between two given numbers.
  
  def absolute_difference(A, B): 
      return abs(A - B) 
    
  assert absolute_difference(9, 5)==4
  assert absolute_difference(-9, 5)==14
  assert absolute_difference(9, -5)==14
  assert absolute_difference(-9, -5)==4
output: def absolute_difference(A, B): 
      return abs(A - B)