Doing nothing in Bash

http://ynniv.com/blog/2005/04/doing-nothing-in-bash.html
像是C語言中的;
bash中沒有do nothing的語法

* touch /dev/null [Keystrokes: 15. Runtime: 0.02s]
* sleep 0 [Keystrokes: 7. Runtime: 0.03s]
* A=0 [Keystrokes: 3. Runtime: 0.00s]

interesting