The default sort criteria sorts lexically (alphabetically). You need to specify your own sort criteria. 
my @sorted = sort { $a <=> $b } @numbers;
my $min = $sorted[0];
my $max = $sorted[-1];

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In reply to Re: sort an array with +ve & -ve numbers in it by ikegami
in thread sort an array with +ve & -ve numbers in it by Anonymous Monk

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