What was the purpose of the black codes enacted by southern states during reconstruction after civil war?

from my own personal expirence food stamps has alot this makes it eaiser so we can affod bills and so we can life a better lifestyle not needing to worry about paying actual money to buy food since most people spend 100-300 dollars a month on food so this alot so we can afford other bills and other stuff we need

they had more african americans than any other state.

hope this , have a good day. c;