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    my($quad_1, $quad_2, $quad_3, $quad_4) = 
      split /\./, $array[0];
    
  2. or download this
    $array[0] == '25' and print "The first quadrant is 25\n";
    $quad_1 = $array[0];
    ...
    $quad_3 = $array[2];
    $quad_4 = $array[3]; 
    $quad_1 == '25' and print "The first quadrant is still 25\n";