while (defined my $line = <IN>) { # read all data in one while(){}
 chomp $line; # remove \n from the end of the line
 next if $line eq ''; # skip empty lines
 ...
}

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EDIT: chomp instead of chop
Sorry if my advice was wrong.

In reply to Re: While loop conditions in Perl by aitap
in thread While loop conditions in Perl by joemaniaci

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