Process finished with exit code

逻辑判断：当输入的值等于变量中存储的值的时候，打印欢迎登陆成功，反之，返回错误的用户名和密码。

多重逻辑判断：

#!/usr/bin/env python 
#-*- coding:utf-8 _*-  
""" 
@author:chenjisong 
@file: guess.py 
@time: 2019/04/16 
url:https://www.liaoxuefeng.com
functions:
Software:JetBrains PyCharm 4.5.3
"""
Name_Of_Oldboy = 56
guess_age = int(input("please input your guess number:"))
if guess_age == Name_Of_Oldboy:
    print("Yes,you got it.")
elif guess_age > Name_Of_Oldboy:
    print("think smaller.")
else:
    print("think bigger.")

=====================================================================================

三种判断结果：

1、小于实际数值

"G:\Python 3.6.6\python.exe" G:/practise/oldboy/day1/guess.py
please input your guess number:55
think bigger.

Process finished with exit code 0

2、等于实际数值

"G:\Python 3.6.6\python.exe" G:/practise/oldboy/day1/guess.py
please input your guess number:56
Yes,you got it.

Process finished with exit code 0

3、大于实际数值

"G:\Python 3.6.6\python.exe" G:/practise/oldboy/day1/guess.py
please input your guess number:57
think smaller.

Process finished with exit code 0

第一周-第12章节-Python3.5-while 循环 

while死循环，恒成立：

#!/usr/bin/env python 
#-*- coding:utf-8 _*-  
""" 
@author:chenjisong 
@file: while.py 
@time: 2019/04/16 
url:https://www.liaoxuefeng.com
functions:
Software:JetBrains PyCharm 4.5.3
"""
count = 0
while True:
    print(count)
    count = count + 1
死循环：当条件成立的时候，永久的执行下去的循环，无法跳出循环

当条件成立时候退出循环，否则一直循环下去：

#!/usr/bin/env python 
#-*- coding:utf-8 _*-  
""" 
@author:chenjisong 
@file: guess.py 
@time: 2019/04/16 
url:https://www.liaoxuefeng.com
functions:
Software:JetBrains PyCharm 4.5.3
"""
Name_Of_Oldboy = 56

while True:
    guess_age = int(input("please input your guess number:"))
    if guess_age == Name_Of_Oldboy:
        print("Yes,you got it.")
        break
    elif guess_age > Name_Of_Oldboy:
        print("think smaller.")
    else:
        print("think bigger.")

三次循环计数，如果三次猜不对就退出，如果猜对了立马退出

#!/usr/bin/env python 
#-*- coding:utf-8 _*-  
""" 
@author:chenjisong 
@file: guess.py 
@time: 2019/04/16 
url:https://www.liaoxuefeng.com
functions:
Software:JetBrains PyCharm 4.5.3
"""
Name_Of_Oldboy = 56
count = 0
while True:
    if count == 3:      ####三次计数
        break           ####错误就退出  

    guess_age = int(input("please input your guess number:"))
    if guess_age == Name_Of_Oldboy:
        print("Yes,you got it.")
        break
    elif guess_age > Name_Of_Oldboy:
        print("think smaller.")
    else:
        print("think bigger.")
    count += 1          ####每循环一次，计数器加1