Fellow Monks,
In the book Learning Perl Objects, References and Modules, there is a code example that look like this: 
{ package Animal;
  sub speak {
    our $class = shift;
    print "a $class goes ", $class->sound, "!\n";
  }
}

{ package Cow;
  our @ISA = qw(Animal);
  sub sound { "moooo" }
}

Animal::speak("Cow");

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Are the curly braces around each package necessary? the code appears to work without them. What purpose do they serve?

Thanks
Jonathan

In reply to package question by Anonymous Monk

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