Structs

Structs

Structs are value types that group related data and behavior:

struct Point {
    var x: Int
    var y: Int

    func distanceFromOrigin() -> Double {
        return Double(x * x + y * y)
    }
}

let p = Point(x: 3, y: 4)
print(p.x)  // 3

Memberwise Initializer

Swift automatically generates an initializer from the properties:

let p = Point(x: 3, y: 4)  // free memberwise init

Mutating Methods

Structs are value types, so methods that modify properties must be marked mutating:

struct Counter {
    var count = 0
    mutating func increment() { count += 1 }
}

Your Task

Create a Rectangle struct with width and height (both Int), and two methods:

• area() -> Int — returns width * height
• perimeter() -> Int — returns 2 * (width + height)