Four Kinds of Expressions
Primitive Expressions (no parens)
Constants
numerals, quoted strings, booleans
#t
and
#f
, ...
Variables
names for values. Names can be built-in ("primitives"),
define
d, or the parameters of a procedure (only "lexically within the procedure body")
Compound Expressions (in parens)
Special forms
and
, begin, case,
cond
,
define
, do,
if
,
lambda
,
let
, let*, letrec,
or
, quasiquote, quote, set!
Combinations
"Function call" or "procedure application"
Jim Miller
