How do I create a directory from within Emacs?

Question

How exactly can I create a new directory using Emacs? What commands do I use? (If possible, please provide an example)

Answer 1

You can also run single shell commands using M-!

You're basically sending a string to the command line so you don't get any nice auto-completion but it's useful if you know how to perform an action through the command line but don't know an Emacs equivalent way.

M-! mkdir /path/to/new_dir