Perl Subroutine Prototyping — The correct way to do it

Question

I have a subroutine called debug I use in my code. It basically allows me to see what\'s going on, etc.

sub debug {
    my $message      = shift         


        

Answer 1

You have to declare the same prototype when you define your subroutine:

sub debug($;$); # prototype/declare

... meat of the program ...

sub debug($;$) {
    ...
}