Go program structure - Mini Project: Build & Apply

Go program structure

📖 Scenario: You are learning how to write a simple Go program. Go programs have a specific structure that includes a package declaration, import statements, and a main function where the program starts running.

🎯 Goal: Build a basic Go program that prints a greeting message to the screen. This will help you understand the essential parts of a Go program's structure.

📋 What You'll Learn

Create a package declaration called main

Import the fmt package

Write a main function

Use fmt.Println to print a greeting message

💡 Why This Matters

🌍 Real World

Every Go program you write will start with this structure. It is the foundation for building command-line tools, web servers, and more.

💼 Career

Understanding Go program structure is essential for software development jobs that use Go, such as backend development and cloud services.

1

Create the package declaration

Write the package declaration package main at the top of your Go file.

Go

// Your code here

Need a hint?

Every Go program starts with a package declaration. Use package main for executable programs.

2

Import the fmt package

Add the import statement import "fmt" below the package declaration.

Go

package main

// Your code here

Need a hint?

The fmt package lets you print text to the screen. Use import "fmt" to include it.

3

Write the main function

Write the main function with the exact signature func main() below the import statement.

Go

package main

import "fmt"

// Your code here

Need a hint?

The main function is where your program starts running. Write func main() with curly braces.

4

Print a greeting message

Inside the main function, write fmt.Println("Hello, Go!") to print the greeting message.

Go

package main

import "fmt"

func main() {
    // Your code here
}

Need a hint?

Use fmt.Println to print text inside the main function.