http://www.perlmonks.org?node_id=1149483


in reply to Trying to use substring to find a reverse complement in DNA,

The condition on your for loop is the wrong way round, you need to use less than not greater than, here:-

$i>$length-1;

If you want to know how to fix these things for yourself try the basic debugging checklist

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Re^2: Trying to use substring to find a reverse complement in DNA,
by AnomalousMonk (Archbishop) on Dec 06, 2015 at 02:32 UTC
    ... you need to use less than not greater than ...

    I would say tryingnottofailmytes needs to use less-than-or-equal
        $i <= $length-1
    as the for-loop condition in the OPed code.


    Give a man a fish:  <%-{-{-{-<

Re^2: Trying to use substring to find a reverse complement in DNA,
by tryingnottofailmytes (Novice) on Dec 05, 2015 at 23:24 UTC
    THANK YOU SO MUCH!!!! This is my problem, I get really close in my code (at least I think I do) and I can't find the problems and I freak out and get a terrible score...