下一步

Question

到目前为止，这是我的代码。我正在学习Python中的循环，并且想知道如果用户输入'y'，我将如何重复此代码。

while True:
    num1 = int(input('Please enter a number: '))
    num2 = int(input('Please enter another number: '))

    print('The two added together are: ', num1 + num2)
    response = print('Would you like to see this again? (Enter "y" for yes): ')

Answer 1

尝试以下方法：

response = 'y'
while response == 'y':
    num1 = int(input("Please enter a number: "))
    num2 = int(input("Please enter another number: "))

    print("The two added together are: ", num1 + num2)
    response = input("Would you like to see this again? (Enter 'y' for yes): ")

Answer 2

有多种方法可以做到这一点。

两种常见的方法是初始化response = 'y'并使while循环while response == 'y': ...或while True: ...，如果你没有＆while循环＃39; t从用户那里收到y。你这样做是一个偏好的问题。我更喜欢后者，因为如果我不必这样做，我不想初始化变量，而且当有人正在阅读代码时，IMO会更清楚地发生了什么。

以下是一个例子：

Python 3.3.3 (v3.3.3:c3896275c0f6, Nov 18 2013, 21:19:30) [MSC v.1600 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> while True:
...     num1 = int(input('Please enter a number: '))
...     num2 = int(input('Please enter a number: '))
...
...     print('The two added together are: {}'.format(num1 + num2))
...     response = input('Would you like to see this again? (Enter "y" for yes): ')
...     if response.lower() != 'y':
...         break
...
Please enter a number: 1
Please enter a number: 1
The two added together are: 2
Would you like to see this again? (Enter "y" for yes): y
Please enter a number: 3
Please enter a number: 5
The two added together are: 8
Would you like to see this again? (Enter "y" for yes): n
>>>

下一步

作为学生的进一步练习，将其重写为接受并添加一个一次输入的任意数量的整数，以空行结束。添加错误检查的加分点，以确保用户不输入字符串而不是数字。

如果用户输入'y'，我怎么能重复这个？

2 个答案:

下一步