【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。。。）

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

 

一、输出1，2，3，4，5，6，8，9，10

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

二、求1~100的和

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

三、求1-2+3-4+5...+99的值

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

四、输出1~100所有的奇数

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

五、输出1~100所有的偶数

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

六、用户登录（三次登录机会，用户名和密码自己设定）

 1 #coding=utf-8
 2 #Version:python3.7.0
 3 #Tools:Pycharm 2017.3.2
 4 _date_ = '2018/12/30 8:01'
 5 _author_ = 'Colby'
 6 #import os
 7 num = 1
 8 while num < 4:
 9     temp = 3 - num
10     user_id = input("请输入用户名：")
11     user_passwd = input("请输入密码：")
12     if user_id == "zjx" and user_passwd == "123456":
13         print("登录成功！")
14         break
15     else:
16         if temp > 0:
17             print("登录错误！您还可以输入%d次！"%(temp))
18         else:
19             print("已被锁定!请30秒后重新登录！")
20     num += 1
21     #os.system('cls')