CSE 341 Spring 96 -- 3/29/96 ======================================================= Readings: Touretsky (hereafter "T"), Chapter 1 All of it. Short, easy, important. ====================== Daily notes on the Web (and on MSCC) Newsgroup: uwash.course.cse341 ====================== Last time: 1. The Read Eval Print Loop It's interactive Things aren't always what they look like 2. Basic data types Numbers: integers, floats, ratios Characters: printing, non-printing Strings Boolean: T and NIL "The non-value" NIL 3. Type-checking predicates One built-in predicate for each built-in data type: guaranteed to take any object as input without error guaranteed to return a Boolean Also available: (type-of x) 4. Self-evaluating objects ======================================================== For today: 1. Quick summary of characters and strings 2. The data type SYMBOL establishing bindings how this affects the REPL 3. T and NIL revisited 4. Data operations on symbols 5. Keyword symbols 6. Lists and CONSes