[Tutor] Function returns 'None'

[Luke Paireepinart]

I think the new version is harder to understand.

Sent from my iPhone

On Jul 11, 2010, at 10:43 AM, Nick Raptis <airscorp at otenet.gr> wrote:

> On 07/11/2010 06:28 PM, Nick Raptis wrote:
>> 
>> def recursfac(x,carryover=1):
>>    print 'x:',x,'carryover:', carryover
>>    if x > 1:
>>        carryover *= x
>>        carryover = recursfac(x-1, carryover)
>>    return carryover
>> 
>> And this returns
>> x: 3 carryover: 1
>> x: 2 carryover: 3
>> x: 1 carryover: 6
>> 6
>> 
>> Done!
>> 
> 
> Also, I realized that my final code may be tough to decipher now.. A nicer way to write it would be (the functionality is still exactly the same):
> 
> def recursfac(x,carryover=1):
>    print 'x:',x,'carryover:', carryover
>    if x > 1:
>        carryover *= x
>        result = recursfac(x-1, carryover)
>    else:
>        # done with recursion, start our way up
>        result = carryover
>    return result
> 
> 
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