open FILE, ">testfile.log" || 
        die "Unable to create file: $!";

##</code><code>##

  open(FILE, ">testfile.log") || 
        die "Unable to create file: $!";

##</code><code>##

  open FILE, ">testfile.log"
        or die "Unable to create file: $!";

##</code><code>##

  open(FILE, ">", $log) or die "$log: $!";