我编写了一个 if 语句来检查用户输入是否为“退出”,如果是,则会将活动变量/标志更改为 False,这应该退出我的程序。
所有其他 if 语句都有效,但是当我输入“quit”时,它不会退出程序。相反,我设置的用于检查用户输入中的“退出”的 if 语句似乎被跳过,并且我不断收到错误:
age = int(age)
^^^^^^^^
ValueError: invalid literal for int() with base 10: 'quit'
我的代码如下:
prompt = "What is your age? "
prompt += "enter quit if you are finished "
active = True
while active:
age = input(prompt)
if age == 'quit':
active = False
age = int(age)
if age < 3:
print("Your tix is free")
elif age >= 3 and age <= 12:
print("Your tix costs $10")
else:
print("Your tix costs $15")
您必须使用
break
: 退出循环
prompt = "What is your age? "
prompt += "enter quit if you are finished "
active = True
while active:
age = input(prompt)
if age == 'quit':
active = False
break
age = int(age)
if age < 3:
print("Your tix is free")
elif age >= 3 and age <= 12:
print("Your tix costs $10")
else:
print("Your tix costs $15")