How to build a tree of directories using bash and step through them one by one?

Question

linux

Good day!
There is a certain directory tree, it is necessary to go through each directory one by one, perform a certain operation, and continue moving to the next directory.
How can I do that?

Answer 1

find ./ -type d
will exhaust all directories from the current
bypass in a loop or use the -exec option of find itself