sam wrote:
> def recursive_halve(value):
>
> if value < 1:
> print value
> return value
> else:
> value = value/2
> print value
> if value < 1:
> return value
> else:
> recursive_halve(value)
Missing a return on the last line is likely your immediate problem.
You have more subtle problems, though. First, you have needlessly
reduplicated value<1 test--the first thing recursive_halve does is to
check whether value<1, so there's no need to check whether value<1
before calling it.
Second, you have redundant branching logic. Look at your first else
statement. It does nothing; the else doesn't affect whether the stuff
inside it gets executed or not; it's redundant. It's better style to
not to have such redundancy (either by omitting the else, or having a
single return point).
The following should do exactly what you want.
def recursive_halve(value):
if value < 1:
print value
return value
value = value/2
print value
return recursive_halve(value)
Carl Banks
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