CS 227 lecture -*- Outline -*-

* numbers and symbols (1.3)
	numbers, names (unbound), define, symbols (quote and ')
	give examples of
		integers, negative numbers, rationals, floats,
			 scientific notation
		define, eval of names, errors from undefined
		symbols, quote and ', suppression of eval
		(ask for summary)

** expressions
	use examples of subtraction and division, mult, addition
		2-3 4/5  2-(4/5)  2-'c
		(/ 17 24) vs (/ 17.0 24)
	summarize (operator, operands)
	translation both ways

	if time do exercises of translation: have them
		pass to neighbor
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1. translate to Scheme:
	((3 * y) + 1) / 2
2. Translate to math notation:
	(/ (+ (* a d) (- d e)) 9.7)
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