```
```python
prompt = "\nPlease enter the name of a city you have visited:"
prompt += "\n(Enter 'quit' when you are finished.)"
while Ture:
city = input(prompt)
if city == 'quit':
break
else:
print("I'd love to go to " + city.title() + "!")
为何运行后显示
while Ture:
NameError: name 'Ture' is not defined
这是什么原因?