The Go Programming Language

2. Program Structure

In Go, as in any other programming language, one builds large programs from a small set of basic constructs. Variables store values. Simple expressions are combined into larger ones with operations like addition and subtraction. Basic types are collected into aggregates like arrays and structs. Expressions are used in statements whose execution order is determined by control-flow statements like if and for. Statements are grouped into functions for isolation and reuse. Functions are gathered into source files and packages.

We saw examples of most of these in the previous chapter. In this chapter, we’ll go into more detail about the basic structural elements of a Go program. The example programs are intentionally simple, ...