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  • python——if和elif语句练习

     1 #!/usr/bin/env python
     2 # -*- coding:utf-8 -*-
     3 #例子1
     4 username = input("请输入命令:")
     5 password = input("请输入密码:")
     6 
     7 if username == "lipc" and password == 123:
     8     print("登陆成功")
     9 else:
    10     print("登陆失败")
    11 
    12 
    13 #例子2
    14 fen = int(input("请输入你的成绩:"))
    15 if 0 < fen <= 59:
    16     print("不及格")
    17 elif 60 <= fen <= 79:
    18     print("较好")
    19 elif 80 <= fen <= 99:
    20     print("优秀")
    21 elif fen == 100:
    22     print("满分")
    23 else:
    24     print("无效的输入")
    25 
    26 
    27 #例子3
    28 year = int(input("请输入年:"))
    29 month = int(input("请输入月份:"))
    30 if  month == 1 or  month == 3 or  month == 5 or  month == 7 or  month == 8 or  month == 10 or  month == 12:
    31     print("此月有 31 天。")
    32 elif  month == 4 or  month == 6 or  month == 9 or  month == 11:
    33     print("此月有 30 天。")
    34 elif month == 2 and ((year % 4==0 and year % 100!=0) or (year % 400==0)):
    35     print('29天')
    36 else:
    37     print('28天')
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  • 原文地址:https://www.cnblogs.com/Leonardo-li/p/12104029.html
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