Escape What it does. 含义
\ Backslash () 反斜杠
' Single-quote (') 单引号
" Double-quote (") 双引号
a ASCII bell (BEL) 响铃符
b ASCII backspace (BS) 退格符(也就是键盘上删除键)退格键只会删除前面一个字符，而不是所有字符
f ASCII formfeed (FF) 进纸符
n ASCII linefeed (LF) 换行符
N{name} Character named name in the Unicode database (Unicode only) Unicode数据库中的字符名；name就是它的名字
r ASCII Carriage Return (CR) 回车符
t ASCII Horizontal Tab (TAB) 水平制表符(也就是空出四个空格的长度)
uxxxx Character with 16-bit hex value xxxx (Unicode only) 值为16位十六进制xxxx的字符
Uxxxxxxxx Character with 32-bit hex value xxxxxxxx (Unicode only) 值为32位十六进制xxxx的字符
v ASCII vertical tab (VT) 垂直制表符
ooo Character with octal value ooo 值为八进制ooo的字符
xhh Character with hex value hh 值为十六进制数hh的字符