What Is the Difference Between a Package and a Module in Go

A module is a collection of Go packages stored in a directory tree with a go.mod file, while a package is a single directory containing .go files that compile together. Modules manage dependencies and versions, whereas packages organize code into reusable units.

// Module: myapp (defined by go.mod)
// Package: main (defined by main.go)
package main

import "fmt"

func main() {
    fmt.Println("Hello")
}

Think of a module as a complete software project folder that tracks its own version and dependencies. A package is just one folder inside that project containing related code files. You use modules to share your project with others and packages to keep your code organized.