perl regex syntax

perl regex syntax

To use regular expressions in Perl, the syntax involves using the =~ operator to match a regular expression against a string. Here's a basic example:

if ($string =~ /pattern/) {
    # Do something if the pattern is found in the string
}

In this example, /pattern/ is the regular expression pattern. Perl also provides various modifiers that can be appended to the end of the regular expression to change its behavior, such as i for case-insensitive matching and g for global matching.

Additionally, you can use the m// operator for more complex matching operations:

if ($string =~ m{pattern}i) {
    # Do something if the case-insensitive pattern is found in the string
}

These are just a few basic examples of the Perl regex syntax. Perl's regular expression support is powerful and flexible, allowing for complex pattern matching and substitution operations.