第一周第二次作业

2-2 将一条消息存储到变量中，将其打印出来；再将变量的值修改为一条新信息，并将其打印出来。

message = "Hello!"
print (message)

message = "Python!"
print (message)

结果是：

Hello!
Python!

2-3 将用户的姓名存到一个变量中，并向该用户显示一条消息。显示的消息非常简单，如“Hello Eric, would you like to learn some Python today?”

name = 'Eric'
print ("Hello " + name + ", would you like to learn some Python today?")

结果是：

Hello Eric, would you like to learn some Python today?

2-4 将一个人名存储到一个变量中，再以小写、大写和首字母大写的方式显示这个人名。

name = "zheng pangpang"
print (name.lower())

print (name.upper())

print (name.title())

结果是：

zheng pangpang
ZHENG PANGPANG
Zheng Pangpang