【python学习】新手基础程序练习（一）

　　首先得先编一下程序员必须编的程序——Hello World……（这应该是程序员情结。。。）

 #coding=utf-8
 #Version:python3.7.0
 #Tools:Pycharm 2017.3.2
 _date_ = '2018/12/30 12:26'
 _author_ = 'Colby'
 print('Hello World!')

一、输出1，2，3，4，5，6，8，9，10

 #coding=utf-8
 #Version:python3.7.0
 #Tools:Pycharm 2017.3.2
 _date_ = '2018/12/30 7:49'
 _author_ = 'Colby'
 count = 0
 num = 1
 while count < 10:
     if num == 7:
         pass
     else:
         print(num)
     num += 1
     count += 1

二、求1~100的和

 #coding=utf-8
 #Version:python3.7.0
 #Tools:Pycharm 2017.3.2
 _date_ = '2018/12/30 7:52'
 _author_ = 'Colby'
 num = 1
 count = 0
 while num < 101:
     count = count + num
     num += 1
 print(count)

三、求1-2+3-4+5...+99的值

 #coding=utf-8
 #Version:python3.7.0
 #Tools:Pycharm 2017.3.2
 _date_ = '2018/12/30 7:54'
 _author_ = 'Colby'
 num = 1
 count = 0
 while num < 100:
     temp = num % 2
     if temp == 0:
         count = count - num
     else:
         count =count + num
     num += 1
 print(count)

四、输出1~100所有的奇数

 #coding=utf-8
 #Version:python3.7.0
 #Tools:Pycharm 2017.3.2
 _date_ = '2018/12/30 7:58'
 _author_ = 'Colby'
 num = 1
 while num < 101:
     temp = num % 2
     if temp == 0:
         pass
     else:
         print(num)
     num += 1

五、输出1~100所有的偶数

 #coding=utf-8
 #Version:python3.7.0
 #Tools:Pycharm 2017.3.2
 _date_ = '2018/12/30 8:00'
 _author_ = 'Colby'
 num = 1
 while num < 101:
     temp = num % 2
     if temp == 1:
         pass
     else:
         print(num)
     num += 1

六、用户登录（三次登录机会，用户名和密码自己设定）

 #coding=utf-8
 #Version:python3.7.0
 #Tools:Pycharm 2017.3.2
 _date_ = '2018/12/30 8:01'
 _author_ = 'Colby'
 #import os
 num = 1
 while num < 4:
     temp = 3 - num
     user_id = input("请输入用户名：")
     user_passwd = input("请输入密码：")
     if user_id == "zjx" and user_passwd == "":
         print("登录成功！")
         break
     else:
         if temp > 0:
             print("登录错误！您还可以输入%d次！"%(temp))
         else:
             print("已被锁定!请30秒后重新登录！")
     num += 1
     #os.system('cls')