Here are the first 3 paragraphs of Chapter 10 of Essential ActionScript 3.0
10. Statements and Operators
This chapter provides a reference-style overview of ActionScript’s statements and operators—many of which we’ve already seen in this book. Rather than discussing each statement and operator in isolation, this book teaches the use of statements and operators in the context of other programming topics. Accordingly, this chapter lists many cross-references to discussion and usage examples found elsewhere in this book. For information on operators not covered in this book, see Adobe’s ActionScript Language Reference.
Statements are one kind of directive, or basic program instruction, consisting of a keyword (command name reserved for use by the ActionScript language) and, typically, a supporting expression.
Table 10-1 lists ActionScript’s statements, their syntax, and purpose.