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== Példák ==
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===Bourne shell===
In [[Bourne shell|sh]], the * character is special, expanding via [[Glob()|globbing]]. In isolation, it expands to the names of all files in the current directory. So to refer to a file literally called * you need to tell the shell to ''not'' interpret it in this way, which you do by preceding it with a backslash (\) – this ''escapes'' the * character. Compare:
<tt>rm *</tt>
= delete all files in the current directory
<tt>rm \*</tt>
= delete the file named *-->
=== Programozási nyelvek ===
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== Categories ==
* In [[alphabet]] [[coding]] schemes, a specially designated [[character (computing)|character]], the occurrence of which in the [[data]] signifies that one or more of the characters to follow are from a different character [[code]], ''i. e.,'' have meanings other than normal.
* In a text-control [[sequence]] of characters, a [[control character]] that indicates the beginning of the sequence and the end of any preceding text. This is for instance used to control [[text terminal]]s and printers (see [[escape sequence]]).
* In the [[ASCII]] character code, the character ESC with [[decimal]] code 27 and [[hexadecimal]] code 1B.
Early reference to this term is found in [[Bob Bemer]]'s IBM technical publications.
''Some of this article is based on material from [[Federal Standard 1037C]]''.
The [[Escape key]] is usually found on standard PC keyboards. However it is commonly absent from keyboards for PDAs and other devices not designed primarily for ASCII communications, and not generally used as part of the common user interface for applications on the Windows operating system. The DEC VT220 series was one of the few popular keyboards that did not have a dedicated Esc key, instead using one of the keys above the main keypad, though it is debatable if this contributed to the failure of the DEC personal computer series that used this keyboard.
==External links==
*[http://www.trailing-edge.com/~bobbemer/ESCAPE.HTM That Powerful ESCAPE Character – Key and Sequences] – [[Bob Bemer]]
* [http://www.codecodex.com/wiki/index.php?title=Escape_sequences_and_escape_characters Escape sequences and characters in Java, C, C++, VB, Python and other languages]
==See also==
* [[Esc key]]
* [[Escape sequence]]
* [[ANSI escape code]]
* [[Delimiter]]
* [[Metacharacter]]-->
[[Kategória:Informatika]]
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