But what is true in Perl is well-defined: http://perldoc.perl.org/perlsyn.html#Truth-and-Falsehood http://perldoc.perl.org/perlsyn.html#Truth-and-Falsehood And

But what is true in Perl is well-defined: http://perldoc.perl.org/perlsyn.html#Truth-and-Falsehood http://perldoc.perl.org/perlsyn.html#Truth-and-Falsehood And modules doesn't have to end with 1;. They must return a true value :) Added: If one really want booleans, there is [1]. [1] https://metacpan.org/pod/boolean https://metacpan.org/pod/boolean