In more detail
\n is a newline, \t a tab, \" a quote and \\ a backslash. Escaping rules differ by language: JSON writes He said "hi" as He said \"hi\", SQL doubles a single quote (O''Brien) and a regex escapes . as \..
Glossary
Development
Escape sequence
An escape sequence is a backslash followed by a character that stands for something that cannot be typed directly in a string, such as a newline or a quotation mark.
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See also
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Glossary
Regular expression
A regular expression (regex) is a pattern written in a compact syntax that describes a set of strings, used to search.
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Glossary
SQL injection
SQL injection is an attack in which input is crafted so that part of it is executed as database commands.
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Glossary
HTML entity
An HTML entity is a code such as `&` or `©` that stands for a character that is reserved in HTML or hard to type.