trailing zero works with integer storage,
i.e. old 1234 becomes 12340 and new flight number could be 12345.
Mentally if the number has significance for sort order etc, you can think they are like decimals they would be 1234.0 and 1234.5, when not set in older systems it can be ignored i.e. 1234.0 is same as 1234.
Mentally if the number has significance for sort order etc, you can think they are like decimals they would be 1234.0 and 1234.5, when not set in older systems it can be ignored i.e. 1234.0 is same as 1234.