if ($genes[2] eq $hugo[$i]) { print $OUT "$genes[0]\t$genes[1]\t$genes[2]\t$genes[3] +\t$hugo[1]\n"; }) #### #added by me else { print $OUT "$genes[0]\t$genes[1]\t$genes[2]\t$genes[3]\tHUGO_notfound\n"; $i++; }