CSC151, Class 6: Starting Scheme

Overview
* Summary of Scheme
* Lab: DrScheme
* Lab: Beginning Scheme
* Reflection
  + What did I learn?
  + What was particularly surprising?
  + What was particularly interesting?

Admin
* Homework 1 due tomorrow.  Questions?
* Different sections of CSC151 are very different
* Sniff.  No Andy to pick on today
* No candy today.  Do you really need candy every day?

Ten second guide to Scheme syntax
Scheme has expressions
( _________ ___ ___ ___ ___ )
  operation values ......

(+ 2 3)

REFLECTIONS
* People work at very different rates.  Don't feel bad
  if you take longer than others.  I'll try to provide
  extra work for those who work really quickly.
* Yes, you really do need those open and close parens
* Top panel: Stuff to save; Bottom panel: Scratch work
  + Which should you use?  Personal preference.
* How do you know that the square root of 137641 is really 137?
* What do scheme's error messages for
  (2 + 3)
  2 + 3 5
2
#<primitive>:+
3
5
* Delete doesn't delete forward.  Blah.