Metacharacter in Perl

What is a Metacharacter?


Metacharacter Default Behaviour
\ Quote next character
^ Match beginning-of-string
. Match any character except newline
$ Match end-of-string
| Alternation
() Grouping and save subpattern
[ ] Character class

Metacharacters serve specific purposes in a pattern. If any of these metacharacters are to be embedded in the pattern literally, you should quote them by prefixing it by "\", similar to the idea of escaping in double-quoted string. In fact, the pattern in between the forward slashes are treated as a double-quoted string.

Example :

($string =~ m/()/)

The above code "(" braces gives an error, so in order to escape this parenthesis, we are using the forward slashes, it is similar for using the double quotes.

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