Python学习--day1--作业

1、使用while循环输入 1 2 3 4 5 6     8 9 10

1 count = 1
2 while count <= 10:
3     if count != 7:
4         print(count)
5     count+=1

2、求1-100的所有数的和　　

1 count = 1
2 sum = 0
3 while count <= 100:
4     sum += count
5     count += 1
6 print(sum)

3、输出 1-100 内的所有奇数

1 count = 1
2 while count <= 100:
3     if(count % 2 == 1):
4         print(count)
5     count += 1

4、输出 1-100 内的所有偶数

1 count = 1
2 while count <= 100:
3     if(count % 2 == 0):
4         print(count)
5     count += 1

5、求1-2+3-4+5 ... 99的所有数的和

 1 count = 1
 2 sum_1 = 0
 3 sum_2 = 0
 4 while count <= 100:
 5     if(count % 2 == 1):
 6         sum_1 = sum_1 + count
 7     else:
 8         sum_2 = sum_2 + count
 9     count += 1
10 print(sum_1-sum_2)

6、用户登陆（三次机会重试）

 1 count = 1
 2 name = 'hahaha'
 3 pwd  = 'hehehe'
 4 while count <= 3:
 5     user_id = input('请输入用户名:')
 6     user_pwd = input('请输入登陆密码:')
 7     if user_id == name and user_pwd == pwd:
 8         print('Welcome~')
 9         break
10     else:
11         print('输入错误，你还有',3-count,'次机会！')
12         count+=1