printf("%-10s %-10s %s\n", $name, $dob, $age);

##</code><code>##

printf("%-${max_name_length}s %-10s %s\n", $name, $dob, $age);

##</code><code>##

printf("%-*s %-10s %s\n", $max_name_length, $name, $dob, $age);