Perl

Subroutines (subs) are Perl's functions. They collect all their arguments in the special @_ array, giving you great flexibility in how you handle parameters.

Perl makes reading and writing files straightforward. The three-argument form of open() is the modern, secure way to handle files.

Regular expressions are built into Perl's core syntax. They let you match, extract, and transform text with concise, powerful patterns.

Perl has three fundamental data structures: scalars (single values), arrays (ordered lists), and hashes (key-value maps). Their sigils ($, @, %) tell you which you are using.

Perl is a high-level, general-purpose scripting language famous for its text-processing power and flexible regular expression support.