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转义字符	含义
\n	newline 换行符
\r, \c	newline 换行符
\l	line feed 换行符
\f	form feed 换页符
\t	tabulator 制表符
\v	vertical tabulator 垂直制表符
\	backslash 反斜线转义符
"	quotation mark 双引号
'	apostrophe 单引号
\ '0'..'9'+	character with decimal value d; all decimal digits directly following are used for the character 十进制数字字符
\a	alert 警告符
\b	backspace 退格符
\e	escape [ESC] 取消符
\x HH	character with hex value HH; exactly two hex digits are allowed
十六进制数字字符，只允许两个十六进制数

| 转义字符 | 转义字符 |
| \n | newline 换行符 |
| \r, \c | carriage return 回车符
| \l | line feed 换行符 |
\f form feed 换页符
\t tabulator 制表符
\v vertical tabulator 垂直制表符
\ backslash 反斜线转义符
" quotation mark 双引号
' apostrophe 单引号
\ '0'..'9'+ character with decimal value d; all decimal digits directly following are used for the character 十进制数字字符
\a alert 警告符
\b backspace 退格符
\e escape [ESC] 取消符
\x HH character with hex value HH; exactly two hex digits are allowed
十六进制数字字符，只允许两个十六进制数