On Mon, 26 Mar 2012 08:11:03 -0400, Dave Angel wrote:
> On 03/26/2012 07:45 AM, redstone-c...@163.com wrote:
>> I know the print statement produces the same result when both of these
>> two instructions are executed ,I just want to know Is there any
>> difference between print 3 and print '3' in Python ?
>
> This is a non-question. The input is the same, the output is the same,
> what else matters?
def fib1(n):
if n == 0: return 0
elif n == 1: return 1
f2, f1 = 0, 1
for _ in range(2, n+1):
f2, f1 = f1, f2 + f1
return f1
def fib2(n):
if n == 0: return 0
elif n == 1: return 1
else: return fib2(n-1) + fib2(n-2)
Try calling fib1(35) and fib2(35). Still think only the input and output
matter? :)
For the record, fib2(35) ends up making a total of 29860703 function
calls, compared to 35 iterations for fib1.
--
Steven
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