字符串拼接+:
first="hello" #将hello赋值给变量first
second="world" #将world赋值给变量second
full=first+“ ”+second #拼接first 空格 second并复制给full
print(full) #打印full完整的值
--------------------------
hello world
--------------------------
示例1：
first="hello"
second="world"
full=first+" "+second
print(full)
print("Baby,"+full.title())
拼接后都存储在一个变量中：
first="hello"
second="world"
full=first+" "+second
msg="Baby,"+full.title()+"!"
print(msg)
-------------------------------------
制表符\t：不使用表格的情况下在垂直方向按列对齐文本。
换行符\n
示例：
print("Hello")
print("\tHello")
print("HelloWorld")
print("Hello\nWorld")
print("Lauguages:\n\tPython\n\tJAVA\n\tC++\n\tRuby")
------------------------------------------------------------------
Hello
Hello
HelloWorld
Hello
World
Lauguages:
Python
JAVA
C++
Ruby
------------------------------------------------------------------
删除字符串末尾空白方法:rstrip()
删除字符串开头空白方法:lstrip()
同时删除字符串开头末尾空白方法:trip()
示例
first=input("请输入你的名字:")
first=first.rstrip() #直接调用的话只能暂时删除空白，下一次访问first的值时依然会有空白，要永久删除这个字符的空符号，必须将删除操作的结果再存回到变量中
first=first.lstrip()
first=first.strip()
print(first)
------------------------------------------------------------------
name=input("请输入你的名字：")
msg="hello"+" "+name.title()+","+"would you like to learn some Python today?"
print(msg)
作业：
-------------------------------------------------------------------------------------------------------
name = input("请输入你的名字：")
msg = "hello"+" "+name.title()+","+"would you like to learn some Python today?"
print(msg)
name = name.title()
print(name)
name = name.upper()
print(name)
name = name.lower()
print(name)
-------------------------------------------------------------------------------------------------------
请输入你的名字：sandy shirley
hello Sandy Shirley,would you like to learn some Python today?
Sandy Shirley
SANDY SHIRLEY
sandy shirley
-------------------------------------------------------------------------------------------------------