C++ Reserved or Non-graphic Characters
| Character | ASCII Representation | ASCII Value | Escape Sequence |
| Newline | NL (LF) | 10 | \n |
| Horizontal tab | HT | 9 | \t |
| Vertical tab | VT | 11 | \v |
| Backspace | BS | 8 | \b |
| Carriage return | CR | 13 | \r |
| Formfeed | FF | 12 | \f |
| Alert | BEL | 7 | \a |
| Backslash | \ | 92 | \\ |
| Question mark | ? | 63 | \? |
| Single quotation mark | ' | 39 | \' |
| Double quotation mark | " | 34 | \" |
| Octal number | ooo | -- | \ooo |
| Hexadecimal number | hhh | -- | \xhhh |
| Null character | NUL | 0 | \0 |