[已解决]为什么会一直循环下去？

始不垂翅

输入no也无法出循环，求助大佬蟹蟹

def again():
    answer = ''
    while answer != 'yes' and answer != 'no':
            answer = input('do you want to have play again?(yes or no):')
answer = 'yes'
while answer == 'yes':
        again()

最佳答案

月排行榜 / 总排行榜

qiuyouzhi

2020-8-7 18:17:05

def again():
    global answer
    while answer != 'no':
            answer = input('do you want to have play again?(yes or no):')
answer = 'yes'
again()

跳转到最佳答案楼层

zltzlt

修改局部变量不会影响全局变量。这样试试：

def again():
    answer = input('do you want to have play again?(yes or no):')
    return answer


answer = 'yes'
while answer == 'yes':
    answer = again()

qiuyouzhi

def again():
    global answer
    while answer != 'no':
            answer = input('do you want to have play again?(yes or no):')
answer = 'yes'
again()

始不垂翅

qiuyouzhi 发表于 2020-8-7 18:17

好的蟹蟹大佬

始不垂翅

zltzlt 发表于 2020-8-7 18:16
修改局部变量不会影响全局变量。这样试试：

谢谢大佬

始不垂翅

zltzlt 发表于 2020-8-7 18:16
修改局部变量不会影响全局变量。这样试试：

大佬这个return answer 是不是可以不用加呀

zltzlt

始不垂翅 发表于 2020-8-8 06:52
大佬这个return answer 是不是可以不用加呀

必须要加，这是函数的返回值