Custom logic for data validation in forms

[afernando]

Hi,

It would be really great if we can manually specify a logic for a field to decide if the entered data is valid or not. 

For exapmle if I want users to enter only even numbers to a text field I should be able to specify that. Thanks

[martinlusk]

Hi, I'm impressed with what i've seen of Powerapps so far. I could see Powerapps becoming especially useful if it had the ability to add background programming such as is the case with the vba editor in other Microsoft Office products. Short of this I've added my vote to the comment above because adding advanced validation rules is a large part of the need for this. 

Thanks