Outline for May 21, 2007

1. Greetings and felicitations!
2. Conditionals
   1. True, false, and expressions (0, None are false, all else is true); not, or, and
   2. if ... elif ... else
3. While loops; the rolldie20-for.py program
   1. Sentry variable
4. For loops; the rolldie20-2.py program
   1. range(n) and variants
5. Loops and strings: the strings_stuff.py program
   1. Breaking a string into individual characters
   2. Creating new strings; reverse a string