Difference between revisions of "Character escape codes"
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\xhh : hh is any ASCII value in HEX | \xhh : hh is any ASCII value in HEX | ||
| − | + | Escape sequences: | |
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! style="background:#ffdead;" width="30" | Char | ! style="background:#ffdead;" width="30" | Char | ||
Revision as of 08:27, 1 April 2008
Escape sequences use an escape character to change the meaning of the characters which follow it. In the Event Handler backslash (\) or percent (%) is used as escape character. Escape sequences might be used in the EDO command to generate non-printable ASCII characters.
Some frequently used escape sequences:
\r = Carriage Return \n = Line Feed \t = Tab \xhh : hh is any ASCII value in HEX
Escape sequences:
| Char | Code | Alt. code | Hex | Description |
|---|---|---|---|---|
| , | %, | %c | 2C | Comma |
| ( | %( | %o | 28 | Opening parenthese |
| ) | %) | %p | 29 | Closing parenthese |
| " | %" | %d | 22 | Double quote |
| ; | %; | %e | 3B | Semicolon |
| \ | %\ | 5C | Backslash | |
| % | %% | 25 | Percent | |
| TAB | %t | 09 | ASCII TAB (Horisontal tab) | |
| SP | %s | 20 | Space | |
| CR | %r | 0D | Carriage return | |
| LF | %n | 0A | Line feed | |
| BEL | %a | 07 | Bell (Alert) | |
| BS | %b | 08 | Backspace | |
| NUL | %0 | 00 | ASCII NUL | |
| %xhh | %#hh | 'hh' is the ASCII character code as 2 hex digits. Note that you must use 2 digits. | ||
| %l | 80 | Extended NUL ('\x80') | ||
| %q | to quote next character in string (if not parameter or end of string) |
\ can be used instead of %.
By using the escape sequence '%xhh' all sorts of ASCII characters can be sent on the EDO port.
Example: CR (Carriage Return), which has the hexadecimal value 0D, can be generated by any of the following escape sequences:
\r %r \x0D %x0D %#0D