If you're on *ix, use the system sort utility (sort -n). If you're on Windows, its sort command doesn't seem to have a numerical option (see sorting in XP).

As an aside, you'll likely get much better response from the Monks if you, first, show what you've tried (in this case, seemingly, nothing), and, second, don't ask for code.

Oh, and a hint:

@out = sort { $a <=> $b } @in; # to sort array @in numerically, and pu
+t it into @out.
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