Regex problem

From the examples you’ve mentioned (JXN-12345-1, JXN-12875-2, ALA-3165-0) the Regex you are using is ^[A-Za-z]{3}-\d+-\d$.

The format you want looks like : 3 alphabets - any number of digits - single digit. You can add {1} for the last digit. ^[A-Za-z]{3}-\d+-\d{1}$$

If it doesn’t resolve, please give an example of false result which you are getting and don’t want.

@Aima Arif 

Try using the following:

^[A-Z]{3}-\d{4,5}-\d{1}$

Regards