- alert (bell)
- backspace
- an escape character (not ANSI C)
- form feed
- newline
- carriage return
- horizontal tab
- vertical tab
- backslash
- single quote
- double quote
- the eight-bit character whose value is the octal value
nnn(one to three digits)
- the eight-bit character whose value is the hexadecimal value
HH(one or two hex digits)
- a control-x character
\a\b\e\E\f\n\r\t\v\\\'\"\nnn\xHH\cx
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