Python “如何打印”；是”；“当写下时”；“是”；在；你确定要退出吗；问题

当用户在“确定退出”问题中写入“y”时，我想打印“是”，当用户在“确定退出”问题中写入“n”时，我想打印“否”。 第二个问题是；如果我写任何字母而不是“y”或“n”，代码仍在运行。如何修复它

residuary = 1000

while True:

    operation = input("Select operation: ")

    if(operation == "q"):
        print("Are you sure for exit? (y/n)")
        answer = input("Answer:")
        y = "yes"
        n = "no"
        if(answer == "y"):
            print("See you again ")
            break
        else:
            continue
    elif(operation== "1"):
        print("Residuary is ${} .".format(residuary))
    elif (operation== "2"):
        amount = int(input("Amount you want to invest: "))
        residuary += amount
        print("${} sent to account.".format(amount))
        print("Available Residuary ${} ".format(residuary))
    elif (operation == "3"):
        amount = int(input("Amount you want to withdraw: "))
        if(amount > residuary):
                print("You can not withdraw more than available residuary!")
                continue
        residuary -= amount
        print("${} taken from account.".format(amount))
        print("Available Resiaduary ${} ".format(residuary))
    else:
        print("Invalid Operation!")

---

您只需在打印条件下添加打印语句：

    if(answer == "y"):
        print(y)
        print("See you again ")
        break
    elif (answer == "n"):
        print(n)
        continue
    else:
        break

---

adding else:break将在插入任何其他inout而不是y和n时退出循环

你的问题不是很清楚。您说当用户在“是否确定退出”问题中写入“y”时，我想打印“是”，当用户在“确定退出”问题中写入“n”时，我想打印“否”。但在您使用输入（“回答：”）语句收集用户愿望时，这一行已经打印出来

您是在寻找下面的代码片段吗

if(operation == "q"):
    quit = False
    while(True):
        print("Are you sure you want to exit? ([y]es/[n]o)")
        answer = input("Answer:")
        if(answer.lower() == 'y': #You may check startswith() as well
            quit = True
            print('You chose yes')
            break
        elif(answer.lower() == 'n':
            print('You chose no')
            break
    if quit:
        print("See you again ")
        break
else:
    continue

---

您可以使用解决“仍在运行”问题。您的问题陈述似乎不清楚，并且根据您的第二个问题，您的输入以字符串形式表示，因此它将接受1作为“1”，并将继续运行，直到在代码中建立适当的约束。要在用户键入“y”后立即打印“是”需要在键入时获取单个击键，这取决于操作系统。有一些第三方模块允许这样做，请参阅。回答：y（我想在这里打印“是”，而不是y）是的，再见。您已经定义了一个名为y的变量，它将“是”作为字符串保存。请再次查看您的代码。现在我得到了我的答案，谢谢您。但是我刚刚开始学习Python，现在我才刚刚开始。。。我还没学会“.lower”所以你说除了这个没有别的办法，对吧？Furkan:看到了吗