Hi Monks, Im trying to run a code of mine .. but every time i run it i get the error 
Use of uninitialized value in printf at aprende3.pl line 590

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I know that the error occurs when in the hash of hashes $A->{$key}->{$key2} the program encounters a 0 as value in $key2.. how can i skip that warning? any help would be really appreciated 
foreach my $key (@aminos) {
        print OUT $key,' ';
        foreach my $key2 (@aminos ) {
            printf OUT ("$forprint " , $A->{$key}->{$key2});
            }
        }
    }

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In reply to handling printf 0 error by madM

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