Python语言:Day9练习题及其答案

Python语言:Day9练习题及其答案

#!/usr/bin/python

"""
#第一题(使用while循环输出1,2,3,4,5,6, 8,9,10)
count = 1

while count <= 10:
if count !=7:
print(count)
else:
pass
count += 1
"""

"""
#第二题(求1-100的所有数之和)
n = 1
sum = 0
while n <= 100:
sum +=n
n +=1
print(sum)
"""

"""
#第三题(输出1—100内所有的奇数)
n=1
while n <= 100:
if n % 2 != 0:
print(n)
else:
pass
n +=1
"""

"""
#第四题(输出1—100内所有的偶数)

n=1
while n <= 100:
if n % 2 == 0:
print(n)
else:
pass
n +=1
"""

"""
#第五题(求1-2+3-4+5…99的所有数的和)
n=1
sum=0
while n<100:
if n % 2 != 0:
sum +=n
else:
sum -=n
n +=1
print(sum)
"""

#第六题(用户登录，三次重试机会)

user_name = "admin"
pwd = "123456"
num=1

while True:
n1 = input("用户名:")
n2 = input("密码:")
if n1 == user_name and n2 == pwd:
print("登陆成功!")
break
else:
num +=1
if num==4:
print("3次用户名或者密码均有误!退出程序.")
break

 

posted on 2019-02-05 21:10 AriesAllen 阅读(...) 评论(...) 编辑 收藏