Defining structs in Go - Mini Project: Build & Apply

Defining structs

📖 Scenario: You are creating a simple program to store information about books in a library.

🎯 Goal: You will define a struct to represent a book with its title and author, then create an instance of this struct and display its details.

📋 What You'll Learn

Define a struct named Book with two fields: Title and Author, both of type string.

Create a variable named myBook of type Book with the title "The Go Programming Language" and author "Alan A. A. Donovan".

Print the book's title and author in the format: Title: The Go Programming Language, Author: Alan A. A. Donovan.

💡 Why This Matters

🌍 Real World

Structs are used to group related data together, like storing information about books, people, or products in real applications.

💼 Career

Understanding structs is essential for Go programming jobs, as they are the foundation for creating complex data models and working with APIs.

1

Define the Book struct

Define a struct named Book with two fields: Title and Author, both of type string.

Go

package main

type Book struct {
    // Your code here
}

func main() {

}

Hint

Use type Book struct {} and inside add Title string and Author string.

2

Create a myBook variable of type Book

Inside the main function, create a variable named myBook of type Book with Title set to "The Go Programming Language" and Author set to "Alan A. A. Donovan".

Go

package main

type Book struct {
    Title  string
    Author string
}

func main() {
    // Your code here
}

Hint

Use myBook := Book{Title: "The Go Programming Language", Author: "Alan A. A. Donovan"} inside main.

3

Print the book's title and author

Add a fmt.Println statement inside main to print the book's title and author in this exact format: Title: The Go Programming Language, Author: Alan A. A. Donovan. Use myBook.Title and myBook.Author.

Go

package main

import "fmt"

type Book struct {
    Title  string
    Author string
}

func main() {
    myBook := Book{
        Title:  "The Go Programming Language",
        Author: "Alan A. A. Donovan",
    }
    // Print the book details here
}

Hint

Use fmt.Println("Title:", myBook.Title+",", "Author:", myBook.Author) to print the details.

4

Run the program to see the output

Run the program to display the book's title and author exactly as: Title: The Go Programming Language, Author: Alan A. A. Donovan.

Go

package main

import "fmt"

type Book struct {
    Title  string
    Author string
}

func main() {
    myBook := Book{
        Title:  "The Go Programming Language",
        Author: "Alan A. A. Donovan",
    }
    fmt.Println("Title:", myBook.Title+",", "Author:", myBook.Author)
    // Run the program to see the output
}

Hint

Make sure the output matches exactly with the title and author separated by a comma.