What is closures in Perl?

In Perl, a closure is a feature that allows a subroutine to capture the variables from its surrounding lexical scope. This means that a closure can remember and access those variables even after the parent subroutine has finished executing. Closures are commonly used to create private variables or to encapsulate behavior in a function.

Here’s a basic example of a closure in Perl:


        #!/usr/bin/perl
        use strict;
        use warnings;

        sub outer {
            my $outer_variable = "I am from the outer function";

            return sub {
                print "$outer_variable\n";
            };
        }

        my $closure = outer();
        $closure->();  # This will print "I am from the outer function"