How would you say i dont have a hamster in french?

There are a few ways to say "I don't have a hamster" in French, depending on the context and formality:

Formal:

* Je n'ai pas de hamster. (This is the most literal and straightforward translation.)

Informal:

* J'ai pas de hamster. (This is a more casual and conversational way to say it.)

* Je n'ai pas un hamster. (This is less common but still grammatically correct.)

You can also use a negative question to express the same idea:

* Tu as un hamster? Non, j'en ai pas. (Do you have a hamster? No, I don't.)

The best option will depend on who you are speaking to and the situation.