Go modules overview - Mini Project: Build & Apply

Go Modules Overview

📖 Scenario: You are creating a simple Go program that uses Go modules to manage dependencies. This helps you keep your project organized and makes it easy to share your code.

🎯 Goal: Build a basic Go module project with a go.mod file, add a dependency, and write a simple program that uses that dependency.

📋 What You'll Learn

Create a new Go module with the name example.com/hello

Add the golang.org/x/text module as a dependency

Write a Go program that imports golang.org/x/text/language and prints a language tag

Print the language tag to the console

💡 Why This Matters

🌍 Real World

Go modules help developers manage project dependencies easily, making it simple to build and share Go programs.

💼 Career

Understanding Go modules is essential for Go developers to maintain clean projects and collaborate effectively in professional environments.

1

Initialize a new Go module

Create a new Go module named example.com/hello by writing the line module example.com/hello in a file called go.mod.

Go

# Create a file named go.mod and add the line:
# module example.com/hello

Hint

The go.mod file starts with the module keyword followed by your module path.

2

Add a dependency to the module

Add the dependency golang.org/x/text to your module by running go get golang.org/x/text or by adding it manually in go.mod under require.

Go

module example.com/hello

// Add the dependency golang.org/x/text here
# Your code here

Hint

You can add dependencies by running go get or by editing go.mod to include a require line.

3

Write a Go program using the dependency

Create a file named main.go and write a Go program that imports golang.org/x/text/language. Inside main, create a variable tag using language.Make("en").

Go

package main

import (
	"golang.org/x/text/language"
)

func main() {
	// Create a variable tag using language.Make("en")
	// Your code here
}

Hint

Import fmt to print the tag. Use language.Make("en") to create the tag.

4

Run the program and display the output

Run the program and print the value of tag to the console using fmt.Println(tag).

Go

package main

import (
	"fmt"
	"golang.org/x/text/language"
)

func main() {
	tag := language.Make("en")
	// Print the tag variable
	// Your code here
}

Hint

Use fmt.Println(tag) to show the language tag on the screen.