学习python基础
练习题1、使用while循环输入124568910
#!/usr/bin/python
# -*- coding: utf-8 -*-
n1 = 1
while n1<11:
if n1 == 7 or n1 == 3:
n1 += 1
continue
print(n1)
n1 += 1
2、求1-100的所有数的和
#!/usr/bin/python
# -*- coding: utf-8 -*-
N = 1
Sum = 0
while N<101:
Sum = Sum + N
N += 1
print(Sum)
3、输出1-100内的所以奇数
n1 = 0
while n1<101:
if n1 % 2 != 0:
n1 += 1
print n1
4、输出1-100内所有的偶数
n1 = 0
while n1<101:
if n1 % 2 == 0:
n1 += 1
print n1
5、求1-2+3-4+5...99的所有数和
count = 1
sum = 0
while count<100:
if count % 2 == 1:
sum = sum + count
elif count % 2 == 0:
sum = sum - count
else:
pass
count += 1
print(sum)
6、用户登录（三次重试机会）
count = 0
while count < 3:
User = input("plase username:")
Passwd = input("plase passwd:")
if User == "alex" and Passwd == "alex":
print("登录成功！")
break
else:
print("登录失败！")
count += 1
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