特殊字符

在双引号字符串中使用时，转义字符（反引号`）会重复出现一个特殊字符。

`0    #Null
`a    #Alert/Beep
`b    #Backspace
`f    #Form feed (used for printer output)
`n    #New line
`r    #Carriage return
`t    #Horizontal tab
`v    #Vertical tab (used for printer output)

例：

> "This`tuses`ttab`r`nThis is on a second line"
This    uses    tab
This is on a second line

你还可以转义具有特殊含义的特殊字符：

`#    #Comment-operator
`$    #Variable operator
``    #Escape character
`'    #Single quote
`"    #Double quote