Hi Fabiano,

You can use this "^[0-9]+([0-9]-)+$" it will validate numbers + hyphen.
But note this is for the use case: 75648-

If you want a specific pattern, let us know.

Also this web site is really cool on helping create regexs:

https://regexr.com/

Thank you.

Hi Fabiano,
For the pattern that you've wrote, here's the Regular Expression:

^[0-9]+([0-9]|-[0-9])+$

You can try it with the values you added here on https://regexr.com/

Thank you!