Formal:
* నమస్తే (namaste) - This is a respectful greeting and farewell.
* గుడ్బై (goodbye) - This is a common English borrowing.
* శుభం (shubham) - This means "good fortune" and is a formal way to say goodbye.
Informal:
* బై (bye) - This is a common English borrowing used informally.
* బై బై (bye bye) - This is a more informal version of "bye".
* చూద్దాం (chuddām) - This means "let's see" and is a casual way to say goodbye, often used among friends.
* సరే (sarē) - This means "okay" and is a casual way to end a conversation.
The best way to say goodbye in Telugu depends on your relationship with the person you're talking to and the context of the situation.