Somehow shorter :
use List::Util qw/sum/;
my %h;
@h{'A' .. 'Z', 0 .. 9} = (1 .. 26, 0 .. 9);
my $num = sum @h{map uc, split //, $letters};

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In reply to Re: convert letters into a number by Prof Vince
in thread convert letters into a number by steph_bow

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