Hi Monks.

I was wondering about the benefit of passing one or more references to a sub.

#!/usr/bin/perl -w
use strict;

my $num = 20;
my @array = ( "Carolyn", "Aimee", "Bob", "Janice" );

&PrintData(\$num, \@array);


sub PrintData
{
  my ($value) = @_;
  print "The value of \$num is: ${$value}";
}

[download]


If I dereference the data stored in the private scalar $value, I will see 20 printed to STDOUT. Without that, I can interpolate the value as if it were not in a sub at all. Can I assign more than one sub parameter to a private var ( each individualized )? Since I am still learning, I am trying to understand what references are used for exactly. Does one have to assign the address to a private var? If not, then what is the point?

Thanks in advance,

-DK.

In reply to Passing references to a sub. by DigitalKitty

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