You can use this way as well..

foreach $ip (keys(%subnets)) {
  if("$subnets{$ip}{'comment'}" eq "") {
      $subnets{$ip}{'comment'} = "ALLOCATED";
  }
  print "$subnets{$ip}{'comment'}\n";
}

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In reply to Re^2: Check/set hash of hashes value by sammy_01
in thread Check/set hash of hashes value by stroke

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