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You need to change:

for my $size (@sizeOfTrees) { my $quant = $tree_collection{$years}{$trees}{$size} || "-" +; printf "%9s", "$quant"; # { no warnings; $total += $quant; } # WHY DO I NEED TH +IS? }


for my $size (@sizeOfTrees) { my $quant = $tree_collection{$years}{$trees}{$size} || 0; printf "%9s", $quant || '-'; $total += $quant; }

my $quantity = (); my $total_quantity = (); my $total = (); my $year_total = ();

Why are you trying to assign a list to a scalar variable?    Don't do that, it makes no sense!

printf "%9s", "$quant"; printf "%5s", "$total"; printf "%9s", "$total_col{$i}"; printf "%5s", "$year_total";

Don't quote scalar variables.    Perl is not a shell!    What's wrong with always quoting "$vars"?

In reply to Re: Creating Reports with hashes: Use of uninitialized value while adding integers by jwkrahn
in thread Creating Reports with hashes: Use of uninitialized value while adding integers by GertMT

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