Another possibility, using defined or instead of
disabling warnings.
use v5.16;
use warnings;
my @arr=qw/a b c d e/;
my @bar = qw/12 34 56/;
my $i = 0;
while ($i<($#arr+2)) {
say "\t \$i: $i";
say "\t\t ", $arr[$i] // q{},
", ", $bar[$i] // q{};
++$i;
}
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