Question

skill=input("What is your skill leavel ? E or C ? (Expert of casual): ")
if skill == "E":
    print ("Expert")
elif skill == "C":
    print ("Casual")

如何实现while循环，以便当用户输入E或C以外的答案时，它会再次询问？

Answer 1

Python中没有do-until个循环。常见的方法是while True：

while True:
    skill=input("What is your skill leavel ? E or C ? (Expert of casual): ")
    if skill == "E":
        print ("Expert")
        break
    elif skill == "C":
        print ("Casual")
        break
    print("Invalid input, try again:")

替代：

valid_input = {'E' : 'Expert', 'C': 'Causal'}
skill = None

while skill not in valid_input:
    skill=input("What is your skill leavel ? E or C ? (Expert or casual): ")

print(valid_input[skill])

Answer 2

你可以尝试这样做（注意我对python语法不好）：

所以创建一个名为loop的函数，然后添加一个声明if（skill =！c和skill =！e）然后调用自身的语句

Answer 3

  while True:
    skill=input("What is your skill leavel ? E or C ? (Expert of casual): ")
    if skill == "E":
        print ("Expert")
    elif skill == "C":
        print ("Casual")
    elif skill == "Q":
        break;

在true时使用无限循环，然后在想要退出循环时中断

Answer 4

以下是您可能需要的代码：

while (True):
    kill=input("What is your skill leavel ? E or C ? (Expert of casual): ")
    if kill == "E":
        print ("Expert")
        break
    if kill == "C":
        print ("Casual")
        break

我怎么把它放进去？

4 个答案: