while循環

示例：

age_of_oldboy = 56

count = 0 while True:

    if count == 3:

        #只能嘗試三次

        break

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

    if guess_age == age_of_oldboy :

        print("yes,you got it.")

        break         # 猜對就跳出循環

    elif guess_age > age_of_oldboy:

        print("think smaller...")     #給第二種可能，不是就有可能

    else:

        print("think bigger!")

    count += 1

 

示例2：

age_of_oldboy = 56
count = 0 while count < 3:#簡潔寫法，仍是最多循環三次

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

    if guess_age == age_of_oldboy :

        print("yes,you got it.")

        break

        # 猜對就跳出循環

    elif guess_age > age_of_oldboy:

        print("think smaller...")

    #給第二種可能，不是就有可能

    else:

        print("think bigger!")

    count += 1

    if count == 3:

        countine_confirm = input("do you want keep guessing?")#這4行是能夠詢問是否繼續

        if countine_confirm != 'n':

            count = 0

else:

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