How can I return to the previous working directory quickly in Bash?

Question

When I change into a directory with the cd command, I lose the previous working directory, unless I remember it in my memory. Is there some handy method to go back quickly?

Demo:

$ cd ~/some_path $ cd /another_path $ command_to_go_back_to_some_path 

Answer 1

You can go back to the last dir with cd -

Answer 2

You can also do this

$ pushd ~/some_path $ pushd /another_path $ popd  $ popd