python 基础
1、使用while偱环输入 1,2,3,4,5,6, 8,9,10
#!/bin/env python3
num = 1
while num < 11:
if num == 7:
pass
else:
print(num)
num = num +1
2、求1-100的所有数的和
#!/bin/env python3
n1 = 1
num = 0
while n1 < 101:
num = num + n1
n1 = n1 +1
print(num)
3、输出1-100内的所有奇数
#!/bin/env python3
n1 = 1
while n1 < 101:
if n1 % 2 == 0:
pass
else:
print(n1)
n1 = n1 + 1
4、输出1-100内的所有偶数
#!/bin/env python3
n1 = 1
while n1 < 101:
if n1 % 2 == 0:
print(n1)
else:
pass
n1 = n1 + 1
5、求1-2+3-4+5...-99的所有数的和
#!/bin/env python3
n1 = 1
num = 0
while n1 < 100:
temp = n1 % 2
if temp == 0:
num = num - n1
else:
num = num + n1
n1 = n1 + 1
print(num)
6、用户登陆（三次机 会重试）
#!/bin/env python3
user = 'root'
passwd = 'root'
print("正确的用户名为：root,密码为：root;你一共有三次机会")
count = 1
while count < 4:
u1 = input("请输入用户名： ")
if user == u1:
p1 = input("请输入密码： ")
if passwd == p1:
print("恭喜你输入的用户名和密码正确")
break
else:
print("密码错误，请再次重试")
else:
print("用户名错误，请再次重试")
count = count + 1