Similar to C/C++, JavaScript uses escape sequences to allow you to place special characters into strings. The escape sequence starts with a backslash (\), followed by another character.
Since the backslash is the escape character, to insert the backslash itself you need to double it (\\).
| Escape Sequence |
Character |
| \' |
Single quotation mark |
| \" |
Double quotation mark |
| \\ |
Backslash |
| \b |
Backspace |
| \f |
Form feed |
| \n |
New line |
| \r |
Carriage return |
| \t |
Horizontal tab |
| \ddd |
Octal sequence (3 digits: ddd) |
| \xdd |
Hexadecimal sequence (2 digits: dd) |
| \udddd |
Unicode sequence (4 hex digits: dddd) |
Example 1:
alert ("Please bring your spouse\\partner to the party");
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 To run the code, paste it into JavaScript Editor, and click the Execute button.
Note that only a single \ is shown.
Example 2:
document.write ("He took a glance and said, "This code produces an error" and indeed it does");
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To run the code, paste it into JavaScript Editor, and click the Execute button.
What happens? JavaScript Editor highlights the error and explains it, allowing you to make a speedy correction. In this case, the quatation needs to be preceded by an escape character. The corrected version is below:
document.write ("He took a glance and said, \"This code doesn\'t produce an error\" and indeed it doesn\'t");
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Some useful Unicode symbols:
\u00B1 : superscript 1 : 1
\u00B2 : superscript 2 : 2
The complete list of Unicode characters can be seen at: http://www.unicode.org/charts/
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