It sounds like you're asking about symbolic references. You can use symbolic references, but there are a lot of disadvantages associated with using them.

I think a better way of approaching such a problem would be to use an array or a hash. Something like this:

my @blah = qw/foo bar baz/;

# where you would have accessed "blah" . $i, you can
# now access $blah[$i] instead
for my $i (0..$#blah) {
    print $blah[$i], "\n";
}

# or you can just foreach
foreach my $thing (@blah) {
    print $thing, "\n";
}
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