运算符和编码

count=3
while count>0:
    count=count-1
print("您还有%s次机会"%(count))

1 username = input(‘please input your username:‘)
2 password = input("please input your password:")
3 if (username == ‘sylar‘) and (password == ‘alex‘):
4     print("恭喜您登陆成功!")
5 else:
6     print("登录失败")

count=3
while count>0:
    count=count-1
    username = input(‘please input your username:‘)
    password = input("please input your password:")
    if (username == ‘sylar‘) and (password == ‘alex‘):
        print("恭喜您登陆成功!")
        break
else:
        print("登录失败")
    print("您还有%s次机会"%(count))

name=input(‘请输入名字:‘)
age=int(input("请输入年龄:"))
job=input(‘请输入工作:‘)
hobby=input(‘请输入爱好:‘)

print(‘‘‘------------ info of %s -----------
Name : %s
Age : %d
job : %s
Hobbie:%s
------------- end --------------‘‘‘%(name,name,age,job,hobby))

#print(3>4 or 4<3 and 1==1)    # F
#print(1 < 2 and 3 < 4 or 1>2)    # T
#print(2 > 1 and 3 < 4 or 4 > 5 and 2 < 1) # T
#print(1 > 2 and 3 < 4 or 4 > 5 and 2 > 1 or 9 < 8) # F

#print(1 and 2)    # 2
#print(0 and 2)    # 0
#print(1 and 3)    # 3
#print(2 and 3)    # 3
#print(2 or 0 or 3)    # 2
#print(1 or 3 or 4)    # 1
#print(3 and 5 and 0)    # 5 0
#print(0 or 0 or 5 or 3) # 5

index = 0
while index < 5:
    if index == 3:
        break    # break的时候不会执行while后面的else
    print("旭哥")
    index = index + 1
else:    # 条件不成立. 执行的代码
    print("梁姐")

content = input("请输入你的评论:")
# 马化腾是特殊字符
if "马化腾" in content:
    print("非法的")
else:
    print("合法的")
    
# not in 没有出现xxx