CSC151.02 2003F, Class 24: Local Bindings

Admin
* Did anyone go to Reese's talk?  Where is Reese, anyway?  Where is Nileena?  
* Writeup 2 due.
* No homework for next week.  (Spend time on labs and reading.)
* No lab today, just recitation.
* Should we meet outside today?  Yes.  Courtyard or Zirkle.

Overview:
* Naming values for efficiency.
* Naming values for readability.
* Variants on let.
* Naming local procedures.