[Tutor] recursion surprise

[Marc Tompkins]

On Sat, Jun 8, 2013 at 4:52 PM, Jim Mooney <cybervigilante at gmail.com> wrote:


> Well, I thought
>
>     if num > 10:
>         return num
>
> Was a return statement. Num does become > 10.   You mean I need more than
> one?
>

It is, and you actually have more than one.  All functions return None,
unless you explicitly specify a return value (via a return statement).
Whenever your execution path does NOT go through your return statement - in
other words, if num is NOT greater than 10 - execution falls off the end
and the function returns None.
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