while循环

示例：

age_of_oldboy = 56

count = 0 while True:

    if count == 3:

        #只能尝试三次

        break

    guess_age = int(input("guess age:"))

    if guess_age == age_of_oldboy :

        print("yes,you got it.")

        break         # 猜对就跳出循环

    elif guess_age > age_of_oldboy:

        print("think smaller...")     #给第二种可能，不是就有可能

    else:

        print("think bigger!")

    count += 1

 

示例2：

age_of_oldboy = 56
count = 0 while count < 3:#简洁写法，仍是最多循环三次

    guess_age = int(input("guess age:"))

    if guess_age == age_of_oldboy :

        print("yes,you got it.")

        break

        # 猜对就跳出循环

    elif guess_age > age_of_oldboy:

        print("think smaller...")

    #给第二种可能，不是就有可能

    else:

        print("think bigger!")

    count += 1

    if count == 3:

        countine_confirm = input("do you want keep guessing?")#这4行是能够询问是否继续

        if countine_confirm != 'n':

            count = 0

else:

    print("you have tried too many times..")