Accessing struct fields in Go - Mini Project: Build & Apply

Accessing struct fields

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

🎯 Goal: You will create a struct to hold book details, set up a book variable, and then access and print its fields.

📋 What You'll Learn

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

Create a variable myBook of type Book with Title set to "Go Programming" and Pages set to 300.

Access the Title and Pages fields of myBook and store them in variables bookTitle and bookPages.

Print the values of bookTitle and bookPages.

💡 Why This Matters

🌍 Real World

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

💼 Career

Understanding structs and how to access their fields is essential for Go programming jobs, especially when working with data models and APIs.

1

Create the Book struct

Create a struct type called Book with two fields: Title of type string and Pages of type int.

Go

// Define the Book struct with Title and Pages fields
// Your code here

Hint

Use type Book struct {} syntax to define the struct with the two fields inside.

2

Create a Book variable

Inside the main function, create a variable called myBook of type Book and set Title to "Go Programming" and Pages to 300.

Go

package main

type Book struct {
    Title string
    Pages int
}

func main() {
    // Create myBook with Title "Go Programming" and Pages 300
    // Your code here
}

Hint

Use struct literal syntax: myBook := Book{Title: "Go Programming", Pages: 300}.

3

Access struct fields

Inside the main function, after creating myBook, create two variables: bookTitle and bookPages. Assign myBook.Title to bookTitle and myBook.Pages to bookPages.

Go

package main

type Book struct {
    Title string
    Pages int
}

func main() {
    myBook := Book{
        Title: "Go Programming",
        Pages: 300,
    }
    // Assign myBook.Title to bookTitle and myBook.Pages to bookPages
    // Your code here
}

Hint

Use dot notation to access fields: myBook.Title and myBook.Pages.

4

Print the field values

Use fmt.Println to print the values of bookTitle and bookPages inside the main function.

Go

package main

import "fmt"

type Book struct {
    Title string
    Pages int
}

func main() {
    myBook := Book{
        Title: "Go Programming",
        Pages: 300,
    }
    bookTitle := myBook.Title
    bookPages := myBook.Pages
    // Print bookTitle and bookPages
    // Your code here
}

Hint

Use fmt.Println(bookTitle) and fmt.Println(bookPages) to print the values on separate lines.