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For 2023 - we are now fully retired from IT training.
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Knock out Competition - how many teams?
More Loops and Conditionals example from a Well House Consultants training course
More on More Loops and Conditionals [link]

This example is described in the following article(s):
   • Alternative loops and conditionals in Ruby and Perl - [link]

Source code: mls Module: P206

=head1

This is an example that shows the use of an until loop
(rather than a while loop), and also shows a loop written
the opposite way round to usual.

The application asks you how many teams have signed up for
a competition, then tells you how many you ideally need to
run a knockout competition without any "bye"s.

A second set of code shows the same loop written more
conventionally.

=cut


print "How many sign ups? ";
chop ($ns = <STDIN>);

$need = 1;
$need *= 2 until ($need >= $ns);
print "Should go for $need entrants\n";

$need = 1;
while ($need < $ns) {
        $need = $need * 2;
        }
print "Should go for $need entrants\n";

__END__

Dorothy-2:j10p grahamellis$ perl mls
How many sign ups? 11
Should go for 16 entrants
Should go for 16 entrants
Dorothy-2:j10p grahamellis$

Learn about this subject
This module and example are covered on the following public courses:
 * Perl Programming
 * Perl bootcamp
 * Learning to program in Perl
 * Perl Programming
Also available on on site courses for larger groups

Books covering this topic
Yes. We have over 700 books in our library. Books covering Perl are listed here and when you've selected a relevant book we'll link you on to Amazon to order.

Other Examples
This example comes from our "More Loops and Conditionals" training module. You'll find a description of the topic and some other closely related examples on the "More Loops and Conditionals" module index page.

Full description of the source code
You can learn more about this example on the training courses listed on this page, on which you'll be given a full set of training notes.

Many other training modules are available for download (for limited use) from our download centre under an Open Training Notes License.

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