## illustrative code, untested

$mysheet->writeln('firsttab', "Here are some data");
$mysheet->writeln('firsttab', qw(1 2 3 4 A B));

# or this

foreach (qw(1 2 3 4 A B)) {
  $mysheet->writeln('firsttab', $_);
}
$mysheet->writeln('firsttab');

# and with formats  

$mysheet->writeln('tab2', 10, 15, [.00156, 'percent'], 20);  # passing type=percent as a string looks wrong, I wish I could pass a format object here!!!!