* 알겠습니다 (algesseumnida): This is the most formal way to say "okay," "I understand," or "all right." Use this with superiors, elders, or in formal situations.
* 알겠어요 (algesseoyo): This is a polite way to say "okay," "I understand," or "all right." Use this with people you don't know well or those you want to show respect to.
* 알아 (ara): This is an informal way to say "okay," "I know," or "I understand." Use this with close friends and family.
* 응 (eung): This is a very informal and casual way to say "okay," "yeah," or "uh-huh." Only use this with very close friends.
* 그래 (geurae): Similar to "eung," this is a very informal "okay," "alright," or "yeah." Use only with close friends and family.
The best choice depends on your relationship with the person you're talking to. For most situations, 알겠습니다 (algesseumnida) or 알겠어요 (algesseoyo) are safe and polite options.