Questions & Answers about Kód je na stěně.
Because stěna is the basic dictionary form, but after na when it means a static location (on somewhere), Czech uses the locative case.
So:
- stěna = wall
- na stěně = on the wall
Here, stěně is the locative singular form of stěna.
Here, na means on.
So na stěně means on the wall.
A useful contrast is:
- na stěně = on the wall
- ve stěně = in the wall
So if something is attached to the surface, Czech normally uses na.
Czech does not have articles like a, an, and the.
So Kód je na stěně can mean:
- The code is on the wall
- A code is on the wall
The exact interpretation depends on context.