Tracing
=======

Trace manually these program pieces.

#. .. code:: python

       a = 5
       b = 13
       c = a+b
       a = a-b
       b = b-2*a+ c
       c = round(10/3, 2)

#. .. code:: python

       a = -5.3
       b = int(a)
       b = float(b)
       a = a-b
       b = str(b)

#. .. code:: python

       x = 3
       y = 4
       a = x > y
       b = a and x < y
       a = a or x >= y
       b = a and b
       a = a or False
       b = (a and False) or (b or a)

#. Trace the previous program piece replacing the two first assignments by:
   
   .. code:: python

       x = 4
       y = 3
       
#. Trace the previous program piece replacing the two first assignments by:
   
   .. code:: python

       x = 4
       y = x