Structs and Methods

Model real-world data with structs and attach behavior with methods.

Learning objectives

• Define a struct
• Create struct instances
• Implement methods with impl

Structs

A struct groups related data into one custom type. It is useful for representing objects such as students, products, accounts, or game characters.

Creating Instances

You create a struct instance by providing values for its fields.

Methods

Methods are functions associated with a struct. They are defined inside an impl block.

Example code

struct Book {
    title: String,
    pages: u32,
}

impl Book {
    fn summary(&self) {
        println!("{} has {} pages.", self.title, self.pages);
    }
}

fn main() {
    let book = Book {
        title: String::from("Rust Made Easy"),
        pages: 300,
    };

    book.summary();
}