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{{code|text=<source lang="perl">
use strict;
use warnings;
use Getopt::Long;

my $message, $boolean;
GetOptions('message=s' => \$message, 'boolean' => \$boolean);

print $message . "\n";
print "The boolean -b option was set!\n" if defined $boolean;
print "The boolean -b option was not set!\n" if undef $boolean;
</source>}}

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