Python3.7 初识循环

While 条件：

　　条件为真（True）执行的操作

非常简洁

猜数字游戏：

import random //导入外部模块random
temp = input('Guess the integer: ')
secret = random.randint(1,10) //调用random中的randint()函数
guess = int(temp)
while guess != secret:
    if guess > secret:
        print('too big!')
    else:
        print('too small!')

    temp = input('Try again plz: ')
    guess = int(temp)
print('Bingo!!')
print('Bye~')

F5看效果：

>>>
Guess the integer: 9
too big!
Try again plz: 5
Bingo!!
Bye~
>>> 

这个游戏只有猜对了才能退出，不够人性化，改进一下：

import random
temp = input('Guess the integer: ')
secret = random.randint(1,10)
guess = int(temp)
times = 1

while (guess != secret) and (times < 3):
    if guess > secret:
        print('too big!')
    else:
        print('too small!')

    temp = input('Try again plz: ')
    guess = int(temp)
    times += 1

if (times <= 3) and (guess == secret):
    print('Bingo!!')
    print('Bye~')
else: 
　　print('Run out of times~')

运行效果：

>>> 
Guess the integer: 1
too small!
Try again plz: 2
too small!
Try again plz: 3
Run out of times~
>>>