1. Short for Escape, Esc is a key found on the top-left corner of a computer keyboard and allows the user to abort or cancel an operation. For example, if a slow web page was loading on an Internet browser you could press the escape key to stop the download and not have to wait for it to timeout. In the picture to the right, is a close up picture of what the Esc key looks like on a computer keyboard.
Where is the escape key on the keyboard?
Below is an overview of a computer keyboard with the Esc key highlighted in blue.
Why and where is the Esc key used?
An escape key is typically used in a program when you want to abort, cancel or change what is currently being displayed on the screen. Below are some difference places the escape key is commonly used.
- Stop a browser from loading web page if it is taking too long.
- Close a dialog box, popup window, or menu.
- Used as a shortcut key. For example Ctrl + Esc opens the Windows Start Menu.
- In games the Esc key often shows the game menu.
- Close or resize a full screen window.
- In vi the Esc key switches modes.
Does the Esc key send a break
2. Escape is also shorthand for an escape character, an escape character is a single backward slash ( \ ) in Linux, programming, and regular expressions that performs a special function or treats the following character as text and not a function. Below are some examples of how an escape could be used.
\" or \'
The above example treats the quote character as a quote character and not a beginning or end container. For example, in programming languages such as Perl this is required if you're printing text to a file or the screen that contains a quote. In other words, the command print "This is a \" quote."; would print This is a " quote without escaping the quote the Perl script would generate an error because of the extra quote.
This next example is similar to the first example because the period is also a wild card, which represents any single character. So, if you need match a period in a regular expression and not every character you must escape it to be recognized as a period.
When a file name or directory needs a space in Linux you can use a backward slash followed by a space, to escape the space in a name. If this isn't done, Linux will treat anything after the space as an option or additional command.
Finally, escape characters are also used in escape sequences, to create a function or command. For example, the above \n would create a newline character to the file or screen. See our escape sequence definition for additional examples.
3. Short for escalation, esc is used to describe or refer to an escalation number dealing with an important customer related issue.