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Be-A-Computer: Recursion
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The purpose of these problems is to allow you to test your
understanding of recursion. They should not take
more than an hour to complete.

You should do these warm-up exercises by hand. We provide
files that will allow you to check your answers.

To get started, run ``git pull upstream master`` to make
sure you have the latest files. You can check your answers by 
running the Python program ``recursion.py`` in ``pp/bac/``

Warm-up exercise #1: What is the output of the following code?

.. literalinclude:: bac/recursion.py
   :lines: 3-14

Warm-up exercise #2: What is the output of the following code?

.. literalinclude:: bac/recursion.py
   :lines: 17-35

Warm-up exercise #3: What is the output of the following code?

.. literalinclude:: bac/recursion.py
   :lines: 38-46

Warm-up exercise #4: What is the output of the following code?

.. literalinclude:: bac/recursion.py
   :lines: 49-68