Python学习之路

 1 ‘‘‘
 2 输出1~6 8~10
 3 方法一：
 4 count = 0
 5 while count < 10:
 6     count +=1
 7     if count == 7:
 8         print(‘ ‘)
 9     else:
10         print(count)
11 
12 方法二:
13 count = 0
14 while count < 10:
15     count = count+1
16     if count == 7:
17       continue
18     else:
19         print(count)
20 
21 输出1~100所有数之和
22 sum = 0
23 count = 1
24 while count < 101:
25     sum = sum + count
26     count = count + 1
27 print(sum)
28 
29 输出1~100所有的奇数
30 方法一：
31 count = 1
32 while count < 101:
33     print(count)
34     count  = count + 2
35 
36 方法二：
37 count = 1
38 while count < 101:
39     if count % 2 == 1:
40         print(count)
41     count = count + 1
42 
43  输出1~100所有数之和
44 sum = 0
45 count = 1
46 while count <= 100:
47     sum = sum + count
48     count = count + 1
49 print(sum)
50 
51 输出1~100所有胡偶数
52 方法一：
53 count = 1
54 while count < 101:
55     if count % 2 == 0:
56         print(count)
57     count = count + 1
58 
59 方法二：
60 count = 0
61 while count < 101:
62     print(count)
63     count = count + 2
64 
65 输出1-2+3-4+5...99的所有数的和
66 sum = 0
67 count = 1
68 while count < 100:
69     if count % 2 ==0:
70         sum = sum - count
71     else:
72         sum = sum + count
73     count = count + 1
74 print(sum)
75 
76 方法二：
77 sum = 0
78 count = 1
79 while count < 100:
80     if count % 2 == 0:
81         sum = sum - count
82     elif count % 2 == 1:
83         sum = sum +count
84     count = count + 1
85 print(sum)
86 
87 用户登录（三次机会重试）
88 count = 0
89 while count < 3:
90     username = input(‘请输入账号: ‘)
91     password = int(input(‘请输入密码: ‘))
92     if username == ‘吴鲲鹏‘ and password == 123456:
93         print(‘登录成功‘)
94         break
95     else:
96         print(‘登录失败请重新登录‘)
97     count = count + 1
98 ‘‘‘