No temp value is needed when swapping in Perl: 
($freq[$i], $freq[$j]) = ($freq[$j], $freq[$i]);

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or even (using slices): 
@freq[$i, $j] = @freq[$j, $i];

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لսႽ† ᥲᥒ⚪⟊Ⴙᘓᖇ Ꮅᘓᖇ⎱ Ⴙᥲ𝇋ƙᘓᖇ

In reply to Re^2: Lottery using arrays by choroba
in thread Lottery using arrays by perlguru22

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