请仔细阅读我的示例Python程序

我仍然在学习Python，因为我想向十一岁的孩子（我作为一名教师工作）教授这门语言的基本概念。 我们在基础方面做了一些工作，以便他们理解编程的基本要点，并将任务分解为块等。 Python是将要在全英国范围内教授的新语言，新课程即将出台，我不想教孩子们坏习惯。 下面是我写的一个小程序，是的，我知道它很糟糕，但任何关于改进的建议都将非常感激。

我仍在翻阅关于该语言的教程，所以请温和！ ：O）

# This sets the condition of x for later use
x=0
# This is the main part of the program
def numtest():
    print ("I am the multiplication machine")
    print ("I can do amazing things!")
    c = input ("Give me a number, a really big number!")
    c=float(c)
    print ("The number", int(c), "multiplied by itself equals",(int(c*c)))
    print("I am Python 3. I am really cool at maths!")
    if (c*c)>10000:
        print ("Wow, you really did give me a big number!")
    else:
         print ("The number you gave me was a bit small though. I like bigger stuff than that!")

# This is the part of the program that causes it to run over and over again.
while x==0:
    numtest()
    again=input("Run again? y/n >>>")
    if x=="y":
        print("")
        numtest()
    else:
        print("Goodbye")

你似乎不需要变量x

while True:
    numtest()
    again = input("Run again? y/n >>>")
    if again == "y":       # test "again", not "x"
        print("")
    else:
        print("Goodbye")
        break              # This will exit the while loop

既然你想教好风格：

c = input ("Give me a number, a really big number!")

c=float(c)

不一致。 哪种更好？

如果你真的想要一个无限循环，那么：

    while True:
        numtest()

        again = input("Run again? y/n >>>")

        if again.lower().startswith("n"):
            print("Goodbye")
            break

然后，有人认为使用break是不好的风格，你同意吗？ 你将如何重写循环，以便不使用break？ 你的学生可能会练习吗？

你必须打破循环

你的时间应该是

while again =='y'：

从而

again = 'y'


def numtest():
    print ("I am the multiplication machine")
    print ("I can do amazing things!")
    c = input("Give me a number, a really big number!")
    c = float(c)
    print ("The number", int(c), "multiplied by itself equals", (int(c * c)))
    print("I am Python 3. I am really cool at maths!")
    if (c * c) > 10000:
        print ("Wow, you really did give me a big number!")
    else:
        print ("The number you gave me was a bit small though. I like bigger stuff than that!")

# This is the part of the program that causes it to run over and over again.
while again == 'y':
    numtest()
    again = input("Run again? y/n >>>")
    if again != "y":
        print("Goodbye")

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