because BEGING{} is an implicitly called subroutine in Perl, it can hold any initialization code, You would probably need to use BEGIN{} as a package constructor

package foo;
  BEGIN{
        $text = "Hello\n";
        }
sub subroutine {print $text} return 1;
[download]

now after having initialized $text you can use it in code that calls foo code

require foo;
foo::subroutine();

#will print

Hello
[download]

Other features of BEGIN{}:

• it is run early when your code is compiled (even before the rest of the file is parsed).
• you can use multiple BEGIN{} in the package and Perl will execute them by order of encounter.

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