Day1：If else流程判断

 1 #!/usr/bin/env python
 2 # -*- coding:utf-8 -*-
 3 # Author:Hiuhung Wan
 4 _username = "Hiuhung Wan"
 5 _password = "abcd1234"
 6 username = input("Username:")
 7 password = input("Password:")
 8 if _username == username and _password == password:
 9     print("Welcome user {name} login...".format(name = username))
10 else:
11     print("Invalid username or password!")

 1 #!/usr/bin/env python
 2 # -*- coding:utf-8 -*-
 3 # Author:Hiuhung Wan
 4 age_of_MrWang = 48
 5 guess_age = int(input("Enter the age of Mr Wang:"))
 6 if guess_age == age_of_MrWang:
 7     print("Yes,you got it!")
 8 elif guess_age < age_of_MrWang:
 9     print("Think bigger!")
10 else:
11     print("Think smaller!")