學習總結：

　　變量，字符的由來，python2和python3的區別，控制語句：if，for，while，break，continue用法

學習示例：

　if用法1：判斷年齡

1 # -*- coding: utf-8 -*- 2 # Author:Yang Hang 3 4 age = 75 5 6 guess_age = input("請輸入年齡：") 7 guess_age = int(guess_age) 8 9 if guess_age == age: 10 print("你猜對了！") 11 elif guese_age > age: 12 print("請往小的猜！") 13 else: 14 print("請往大的猜！")

?　　if用法2：登陸示例

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("成功登陸！") 12 else: 13 print("用戶名或密碼有誤，請重新輸入！")

　　for用法1：輸出1到10

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

　　for用法2：猜年齡

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("請輸入年齡：")) 10 if guess_age == age: 11 print("恭喜你猜對了！") 12 break 13 elif guess_age > age: 14 print("請往小的猜！") 15 else: 16 print("請往大的猜！") 17 else: 18 print("輸入次數超過三次，結束")

　　while用法1：

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

　　while用法2：

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("輸入次數超過三次，結束") 11 break 12 guess_age = int(input("請輸入年齡：")) 13 if guess_age == age: 14 print("恭喜你猜對了！") 15 break 16 elif guess_age > age: 17 print("請往小的猜！") 18 else: 19 print("請往大的猜！") 20 count += 1 21 ''' 22 #優化版本 23 while count <3: 24 guess_age = int(input("請輸入年齡：")) 25 if guess_age == age: 26 print("恭喜你猜對了！") 27 break 28 elif guess_age > age: 29 print("請往小的猜！") 30 else: 31 print("請往大的猜！") 32 count +=1 33 if count == 3: 34 countine_confirm =input("你還想繼續猜嗎..?") 35 if countine_confirm != 'n': 36 count = 0 37 else: 38 print("輸入次數超過三次，結束")

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轉載于:https://www.cnblogs.com/sdhzdtwhm/p/7692890.html

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