Formal:
* 네 (ne): This is the most common and polite way to say "yes" or "ok," similar to "yes sir" or "yes ma'am" in English. It is used in formal settings and when addressing someone older or of higher status.
* 알겠습니다 (algetseumnida): This means "I understand" and can be used to indicate you've understood a request or instruction. It's a more formal way of saying "ok."
Informal:
* 응 (eung): This is a casual and informal way to say "yes" or "ok." It is generally used with friends or family.
* 그래 (geurae): This means "that's right" or "okay" and is a casual and slightly more informal way of saying "ok" than "eung."
Other Options:
* 좋아요 (joayo): This means "good" or "okay" and is a more positive and enthusiastic way of saying "ok."
* 괜찮아요 (gwaenchanaayo): This means "it's okay" or "no problem" and is used when you're acknowledging something that is not a problem.
The best way to choose the right Korean word for "ok" is to consider the context and who you are speaking to.