Packages

One package per folder

All .go files in a directory share the same package name. Start simple: one folder, package main.

Import what you use

Unused imports are a compile error. Import paths look like quoted strings.

package main

import (
	"fmt"
	"strings"
)

func main() {
	fmt.Println(strings.ToUpper("go"))
}

Alias an import

Use an alias when two packages would collide or a name is awkward.

import str "strings"

func demo() {
	_ = str.TrimSpace("  hi  ")
}

Package habits

• Keep package names short and lowercase
• Export names by capitalizing them (Println is exported)
• Unexported names start with a lowercase letter
• Prefer the standard library before adding dependencies