Availability::- use_module(library(shell)).(can be autoloaded)

pushd

pushd(+Dir)

popd

dirs

Manage the directory stack:

• pushd/1 is as cd/1, pushing th old directory on a stack
• pushd/0 swaps the current directory with the top of the stack
• popd/0 pops to the top of the stack
• dirs/0 lists the current directory and the stack.