如何将break语句从函数发送到while循环?

你可以试试这个:

def decide(greeting):
    if greeting == "hi":
         return "Hello"
    elif greeting == "bye":
        return "Bye"

x = input("Insert here: ")

while True:
    n = (decide(x))
    print(n)

    if(n == "Bye"):
        break

    x = input("Insert here: ")

您可以在函数中进行打印,并在while循环中检查其输出:

def decide(greeting):
    if greeting == "bye":
        print("Bye")
        return False  # only break on "bye";
    elif greeting == "hi":
        print("Hello")
    return True

while True:
    x = input("Insert here: ")
    if not decide(x):
        break

编辑 基于澄清的问题(函数内无打印)。您的函数可以有多个输出,例如:

def decide(greeting):
    if greeting == "bye":
        return "Bye", False  # return reply and status;
    elif greeting == "hi":
        return "Hello", True
    else:
        return greeting, True  # default case;

while True:
    x = input("Insert here: ")
    reply, status = decide(x)
    print(reply)
    if not status:
        break