Use a hash: 
use strict;
use warnings;

my %lookup = (
    1 => 567898,
    2 => 543267,
);

my @test = qw(0 a 2 1);
for (@test) {
    print exists $lookup{$_} ? $lookup{$_} : $_, "\n";
}

__END__
0
a
543267
567898

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In reply to Re: Convert a number to another number? by toolic
in thread Convert a number to another number? by fatfinger

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