python--while循环

1.最简单的while True循环

1 count = 0
2 while True :
3     if count == 10:
4         print('hello',count)
5         break
6     count += 1

hello 10

2.利用while循环写一个猜年龄程序：有3次机会，猜正确直接退出

 1 age=25
 2 count=0
 3 while count < 3:
 4     guess_age=input("age>>:")
 5     if guess_age.isdigit():
 6         guess_age=int(guess_age)
 7     else:
 8         print('请输入数字')
 9         continue
10     if guess_age > 25:
11         print("往小猜")
12     elif guess_age < 25:
13         print("往大猜")
14     else:
15         print("猜对了")
16         break
17     count += 1
18     if count == 3:
19         print('\n3次机会已用完')

1 age>>:df
2 请输入数字
3 age>>:1
4 往大猜
5 age>>:67
6 往小猜
7 age>>:25
8 猜对了