What do you mean by individual accessors? Do you mean actually have a separate method for each field like "dump_num1"?

Yes, although I wouldn't name it that :-) Here's an example of a common, simple implementation:

sub num1 {
    my $self = shift;
    $self->{num1} = shift if @_;
    return $self->{num1};
}
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That'll let you get the current value with $oo->num1 and set a value with $oo->num1(123);

And i'm not totally familiar with modules/packages.

Your file Numbers.pm would start with package Numbers; use warnings; use strict; and end with 1; (the file needs to return a true value), and then the normal way to include it would be via use Numbers; - that's it. @INC includes the current working directory ., so initially you wouldn't need to change @INC at all if all your files are in the same directory. Later on, once you get into actually building a real library, you can deal with @INC - see for example lib or the -I switch.

Thanks! I've put my package/class in a separate file now. That's more than enough for now really.