So far, everyone has described the "enlightened" way to do this. As in, they read your question, and came to the conclusion that you asked "how do I do X using Y?" and so they were telling you how to do X using X.

I'll go the other route this time. Let's say I haven't been enlightened (for whatever reason, the thought that these were octal didn't occur to me until it was pointed out, so we're not far from the truth here ;->). I would do the following:

use strict;

for my $i (101 .. 200)
{
    my $a = '\\' . $i;
    my $val = eval qq{"$a"} || $@;
    print "$i = $val\n";
}
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This answers your question on how to get perl to write out all the characters for you. But it does seem a bit funny. So I'd go the next step:

use strict;

my %data;
for my $i (101 .. 200)
{
    my $a = '\\' . $i;
    my $val = eval qq{"$a"} || $@;
    #print "$i = $val\n";
    $data{$i} = $val;
}

use Data::Dumper;

$Data::Dumper::Sortkeys = sub {
    [ sort { $a <=> $b } keys %{+shift} ]
};
$Data::Dumper::Useqq = 1;
print Dumper(\%data);
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Now we're getting somewhere interesting. For example, I see that "199 => "\00199"," appears. And yet, I also see "177 => "\177",". At this point, I'd look up the documentation and, hopefully, find out what this really means, as is described by everyone else.