Why structs are used in Go - See It in Action

Why structs are used

📖 Scenario: Imagine you want to keep information about books in a library. Each book has a title, an author, and a number of pages. You want to keep all this information together in one place.

🎯 Goal: You will create a struct in Go to group related information about a book. Then you will create a book using this struct, and finally print the book details.

📋 What You'll Learn

Create a struct named Book with fields Title (string), Author (string), and Pages (int).

Create a variable named myBook of type Book with the values: Title = "Go Programming", Author = "Alice", Pages = 300.

Print the details of myBook in a readable format.

💡 Why This Matters

🌍 Real World

Structs are used to model real-world objects with multiple properties, like books, people, or products.

💼 Career

Understanding structs is essential for Go programming jobs, as they are the foundation for organizing data and building applications.

1

Create the Book struct

Create a struct named Book with three fields: Title of type string, Author of type string, and Pages of type int.

Go

// Define the Book struct here
// Your code here

Hint

Use the type keyword to define a struct. Inside curly braces, list the fields with their types.

2

Create a Book variable

Inside the main function, create a variable named myBook of type Book and assign it the values: Title = "Go Programming", Author = "Alice", and Pages = 300.

Go

package main

type Book struct {
    Title  string
    Author string
    Pages  int
}

func main() {
    // Create myBook variable here
    // Your code here
}

Hint

Use the struct literal syntax with field names to assign values.

3

Print the Book details

Inside the main function, after creating myBook, use fmt.Println to print the myBook variable.

Go

package main

import "fmt"

type Book struct {
    Title  string
    Author string
    Pages  int
}

func main() {
    myBook := Book{
        Title:  "Go Programming",
        Author: "Alice",
        Pages:  300,
    }
    // Print myBook here
    // Your code here
}

Hint

Remember to import the fmt package to use fmt.Println.

4

Print Book details in a friendly format

Replace the previous print statement with a fmt.Printf statement that prints: "Title: Go Programming, Author: Alice, Pages: 300" using the fields of myBook.

Go

package main

import "fmt"

type Book struct {
    Title  string
    Author string
    Pages  int
}

func main() {
    myBook := Book{
        Title:  "Go Programming",
        Author: "Alice",
        Pages:  300,
    }
    // Print book details in a friendly format
    // Your code here
}

Hint

Use fmt.Printf with %s for strings and %d for integers.