How to Implement Methods on a Struct in Rust

Implement methods on a struct by defining an impl block for the struct and adding functions that take &self or &mut self as the first parameter.

struct Rectangle {
    width: u32,
    height: u32,
}

impl Rectangle {
    fn area(&self) -> u32 {
        self.width * self.height
    }
}

The &self parameter allows the method to read the struct's data without taking ownership, while &mut self would allow modification.

Methods are functions that belong to a specific data structure, allowing you to perform actions on that data directly. Think of a struct as a blueprint for a car and methods as the instructions for driving it, like 'accelerate' or 'brake'. You use this pattern to keep related data and the logic that operates on it organized in one place.