Question

基本上我对python很新，所以我决定制作一个简单的计算器，我已经完成了计算器的编码，一切正常，我很高兴，但是我想要一个if-else语句，看看他们是否我想继续另一个计算。所以这是我的代码的顶部和我的代码的底部部分，我想知道如何获得它，以便在代码的'else'部分之后，它只运行其余的代码。

import os
done = ("")
if done == True:
    os._exit(0)
else:
    print ("---CALCULATOR---")

...

done = str(input("Would you like to do another calculation? (Y/N) "))
if done == "N" or "n":
    done = True
if done == "Y" or "y":
    done = False

任何帮助都将不胜感激。

Answer 1

你会想要这样的东西......

import os
done = False

while not done:
    print ("---CALCULATOR---")
    ...

    # be careful with the following lines, they won't actually do what you expect
    done = str(input("Would you like to do another calculation? (Y/N) "))
    if done == "N" or "n":
        done = True
    if done == "Y" or "y":
        done = False

Answer 2

if done == "N" or "n":

以上条件会检查done == "N"或"n"。这将始终评估为True，因为在Python中，非空字符串的计算结果为布尔True。

正如评论中所建议的那样，你应该使用while循环让程序继续执行，直到用户键入“N”或“n”。

import os
finished = False

while not finished:
    print ("---CALCULATOR---")
    ...

    done = str(input("Would you like to do another calculation? (Y/N) "))
    if done == "N" or done == "n":
        finished = True

if-else语句和代码退出

2 个答案: