sub addcommas{
   my ($text)=@_;
   $text=reverse $text;
   $text=~s/(\d\d\d)(?=\d)(?!\d*\.)/$1,/g;
   $text=scalar reverse $text;
   return $text;
}

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In reply to Answer: How do I add commas to a number? by vroom
in thread How do I add commas to a number? by vroom

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