检查回文的功能中的错误在哪里? [英] Where's the bug in this function to check for palindrome?
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问题描述
下面给出的代码用于检查列表是否为回文.它给出了983的正确输出.我在哪里出问题了?
Given below is the code to check if a list is a palindrome or not. It is giving correct output for 983. Where am I going wrong?
def palindrome(num):
flag=0
r=num[::-1]
for i in range (0, len(num)-1):
if(r[i]==num[i]):
flag=1
else:
flag=0
return flag
推荐答案
一旦不匹配,您应立即返回.另外,您只需要迭代到一半的长度即可:
You should return as soon as there is a mismatch. Also, you just need to iterate till half the length:
def function(...):
...
for i in range (0, (len(num) + 1) / 2):
if r[i] != num[i]:
return False
return True
顺便说一句,您不需要该循环.您可以简单地做到:
BTW, you don't need that loop. You can simply do:
def palindrome(num):
return num == num[::-1]
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