Comments

-- Single line comment
#!/usr/bin/osascript
(* Here is
a block
comment *)

Strings

"foo \"bar\" baz"

Operators

a ≠ b
12 + 2 * 5
"DUMPtruck" is equal to "dumptruck"
"zebra" comes after "aardvark"
{ "this", "is", 2, "cool" } starts with "this"
{ "is", 2} is contained by { "this", "is", 2, "cool" }
set docRef to a reference to the first document

Classes and units

tell application "Finder"
text 1 thru 5 of "Bring me the mouse."
set averageTemp to 63 as degrees Fahrenheit
set circleArea to (pi * 7 * 7) as square yards