------------------------------
$VAR1 = 'name';
$VAR2 = 'Fred';
$VAR3 = 'age';
$VAR4 = 27;
------------------------------
$VAR1 = {
          'name' => 'Fred',
          'age' => 27
        };
------------------------------
%hash = (
          'name' => 'Fred',
          'age' => 27
        );
==============================
$VAR1 = {
          'name' => 'Mary',
          'age' => 25
        };
------------------------------
$hashRef = {
             'name' => 'Mary',
             'age' => 25
           };
------------------------------