1 # -*- coding: utf-8 -*-
 2 # Author:Yang Hang
 3
 4 age = 75
 5
 6 guess_age = input("请输入年龄：")
 7 guess_age = int(guess_age)
 8
 9 if guess_age == age:
10     print("你猜对了！")
11 elif guese_age > age:
12     print("请往小的猜！")
13 else:
14     print("请往大的猜！")

 1 # -*- coding: utf-8 -*-
 2 # Author:Yang Hang
 3
 4 _username = 'yanghang'
 5 _passwd = '123456'
 6
 7 username = input("username:")
 8 passwd = input("password:")
 9
10 if username == _username and passwd == _passwd:
11     print("成功登陆！")
12 else:
13     print("用户名或密码有误，请重新输入！")

1 # -*- coding: utf-8 -*-
2 # Author:Yang Hang
3
4 for i in range(10):
5     print("loop",i)

 1 # -*- coding: utf-8 -*-
 2 # Author:Yang Hang
 3
 4 age = 75
 5 count = 0
 6
 7
 8 for i in range(3):
 9     guess_age = int(input("请输入年龄："))
10     if guess_age == age:
11         print("恭喜你猜对了！")
12         break
13     elif guess_age > age:
14         print("请往小的猜！")
15     else:
16         print("请往大的猜！")
17 else:
18     print("输入次数超过三次，结束")

1 # -*- coding: utf-8 -*-
2 # Author:Yang Hang
3
4 count = 0
5 while count < 100:
6     print("count:",count)
7     count = count +1

 1 # -*- coding: utf-8 -*-
 2 # Author:Yang Hang
 3
 4 age = 75
 5 count = 0
 6 '''
 7 #版本1:
 8 while True:
 9     if count == 3:
10       print("输入次数超过三次，结束")
11         break
12 guess_age = int(input("请输入年龄："))
13 if guess_age == age:
14     print("恭喜你猜对了！")
15     break
16 elif guess_age > age:
17     print("请往小的猜！")
18 else:
19     print("请往大的猜！")
20 count += 1
21 '''
22 #优化版本
23 while count <3:
24     guess_age = int(input("请输入年龄："))
25     if guess_age == age:
26         print("恭喜你猜对了！")
27         break
28     elif guess_age > age:
29         print("请往小的猜！")
30     else:
31         print("请往大的猜！")
32     count +=1
33     if count == 3:
34         countine_confirm =input("你还想继续猜吗..?")
35         if countine_confirm != 'n':
36             count = 0
37 else:
38     print("输入次数超过三次，结束")