What are subroutines in Perl? How do you create and use them?

In Perl, subroutines are blocks of code that can be defined and reused to perform specific tasks. They are also known as functions or procedures in other programming languages. Subroutines help in organizing code, improving reusability, and enhancing the maintainability of your Perl programs. Here's an in-depth explanation of subroutines in Perl and how to create and use them effectively: Creating a Subroutine: To create a subroutine in Perl, you follow these steps: 1. Subroutine Declaration: * Start with the keyword "sub" followed by the subroutine name. * Subroutine names should begin with a letter or underscore and can contain alphanumeric characters and underscores. * Example: `sub greet { ... }` 2. Subroutine Body: * The subroutine body consists of the code that gets executed when the subroutine is called. * It can contain any valid Perl code, including variable declarations, control structures, and other subroutines. * Example: ``` perl`sub greet { my $name = ....