Im new to perl im still reading the "Beginning of perl" book, and im not familiar with eval ... i was riding about it and i think i get the point for something... for example

use Net::Telnet::Cisco;

for ($i = 1; $i <= 254; $i++){
  
  $device = "172.16.$i.251";

  my $session = Net::Telnet::Cisco->new(Host => "$device",
            Input_log => "perllogrouter/router$i.log",);

   eval { $session->login('admin', 'admin') or die "Could not connect 
+to $device" };
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in this part i understand that "for loop" make from 1 to 254 and ctr... the part of eval is execute this

{ $session->login('admin', 'admin') or die "Could not connect 
+to $device" };
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and i guess this means if it's negative or not connected if ( $@ ){ # log here #; next } go to the next part ... and the next part is again "for loop". So my question is how can i go the for loop again ...