How do you write yes in greek?

There are two ways to write "yes" in Greek, depending on the context:

* Ναι (Nai): This is the most common and general way to say "yes". It's used in most situations.

* Ουί (Oui): This is a more formal way to say "yes" and is often used in written language or official settings. It's similar to "oui" in French.

So, depending on the situation, you can choose either Ναι (Nai) or Ουί (Oui) to express "yes" in Greek.