referencing and dereferencing in Perl is used for passing data structures to subroutines. for examples @example is an array to pass it to subroutine 

@examples = ('perl', 'linux');
$reference_of_example = \@examples; #referencing
your_sub($ref_example);
sub your_sub {
  $ref = @_;
  print Dumper(@$ref); #@$ref is dereferencing array.
}

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In reply to Re: Passing a hash byreference to a subroutine by karthiknix
in thread Passing a hash byreference to a subroutine by edimusrex

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