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#!/usr/bin/env perl -l

...
    print 'After command line options processed:';
    print "Options: x[$x] y[$y] z[$z]";
}

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$ pm_1196515_option_processing.pl
Option starting values:
...
Options: x[42] y[fred] z[1.5]
After command line options processed:
Options: x[42] y[wilma] z[3.4]