Need help writing a code to sort data into 3 categories.

[Josh Zimmerman 2]

Hi, I am trying to write an expression to sort data into 3 categories. I am looking at error codes, and need it to be something along the lines of (when results=1 then "valid", when results =2 then "invalid", when results = else then "partial"). I have just started writing code about a week ago and am stuck on trying to solve this. The data I am working with is more complex than this but this should be able to help me understand and solve it. Thank you for your help!