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   my $numbers="1 1.0 3.547 92.34 343.2234";

   while($numbers =~ /(^|[^.\d])(\d+)/g) {
     print "$2 is an integer\n";
   }

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   1 is an integer
   1 is an integer
   3 is an integer
   92 is an integer
   343 is an integer