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  1. or download this
    my @array = (1 ..4);
my $size = @array;
print "The size of array \@array is $size\n";
  2. or download this
    use Devel::Size 'size';
my @array = (1 ..4);
my $size = size(\@array);
print "The size of array \@array is $size\n";
  3. or download this
    my @array = (1 ..4);
my $ar_ref = \@array;
...
use Devel::Size 'size';
my $memory = size($ar_ref);
print "The size of array \@array is $memory\n";