1. What is the problem? Be very detailed.
I have two variable weight and height are in (decimal-type) and , what i want when someone doesn't fill weight or height odk collect shows another question which will be (select unknown if you don't know weight or height
2. What app or server are you using and on what device and operating system? Include version numbers.
Xlsx-form, Odk collect
3. What you have you tried to fix the problem?
I'm trying to add a question when someone doesn't fill weight and height questions
4. What steps can we take to reproduce the problem?
You can show me the proper code or send me a proper sheet with relation of the problem
5. Anything else we should know or have? If you have a test form or screenshots or logs, attach below.