print [<FILE>]->[-1];

If you mention such things you should also add that it reads the entire file into memory. That might be a bit overkill...

Another thing that came to my mind, but is restricted to unixy systems: 

my $line = `tail -n1 $file`;

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In reply to Re^3: Read the last line in a text file by moritz
in thread Read the last line in a text file by ganilmohan

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