I understand "yo" is meant to be used as hello or for emphasizing something. But lets say in a situation where I am texting with someone and at the end of that conversation using "yo" instead of "ok" is correct. Lets take this text for instance.
Me : Yo
Roommate : sup
Me: The internet ain't working.
Roommate : Yeah I got the email. I will recharge it later.
Me: Thanks dude.
Roommate : Yo.
In this situation, the roommate is using "yo" for saying "yeah kool, bye".
Can yo be used like that or its just wrong to use "yo" to end a conversation even when texting?
PS: I am sorry If this question has already been asked.