英文:
Why is "else" redundant here in recursion?
问题
"else" here is redundant and not needed
def print_n(s, n):
if n <= 0:
return
else:
print(s)
print_n(s, n-1)
print_n("spam", 5)
英文:
Learning python, I got a question why "else" here is redundant and not needed
def print_n(s, n):
if n <= 0:
return
**else:**
print(s)
print_n(s, n-1)
print_n("spam", 5)
答案1
得分: 0
You can remove the else because the if terminates with a return.
def print_n(s, n):
if n <= 0:
return
print(s)
print_n(s, n-1)
print_n("spam", 5)
I'm not sure that qualifies as redundant because some would like the else to be explicit, not implied. In this case its straightforward, but in the case of a more complicated if clause where the return isn't obvious (maybe there is a loop inside the if), one would like the else to be there.
英文:
You can remove the else because the if terminates with a return.
def print_n(s, n):
if n <= 0:
return
print(s)
print_n(s, n-1)
print_n("spam", 5)
I'm not sure that qualifies as redundant because some would like the else to be explicit, not implied. In this case its straightforward, but in the case of a more complicated if clause where the return isn't obvious (maybe there is a loop inside the if), one would like the else to be there.
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