Packages

You can break Go programs into smaller files and create packages.

Example layout:

src/
	mypackage/
		stuff.go // package mypackage
		other.go
	myexec/
		main.go // package main
		helpers.go

Note: any buildable and executable Go code must be in package main

Building and Running Go Programs

You can build your executable using either go build myexec or go install myexec; in either case, you must set the GOPATH variable. Everything in a package is accessible within the package itself; other packages can only access exported items.

Methods

A method can only be defined for types declared in the same package. In addition, the receiver type of a method must be defined in the same package as the method.

Note: method receivers cannot be an interface type.