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Perl Language Reference Manual
by Larry Wall and others
Paperback (6"x9"), 724 pages
ISBN 9781906966027
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12.3.5 Hexadecimal escapes

Hexadecimal escapes start with \x and are then either followed by a two digit hexadecimal number, or a hexadecimal number of arbitrary length surrounded by curly braces. The hexadecimal number is the code point of the character you want to express.

Note that a character that is expressed as a hexadecimal escape is considered as a character without special meaning by the regex engine, and will match "as is".

Mnemonic: hexadecimal.

ISBN 9781906966027Perl Language Reference ManualSee the print edition