import Cocoa

func greet(_ person: String, on day: String) -> String {
    return "Hello \(person), today is \(day)."
}

// "Hello Tony Bark, today is Tuesday."
greet("Tony Bark", on: "Tuesday")

func calcStats(scores: [Int]) -> (min: Int, max: Int, sum: Int) {
    var min = scores[0]
    var max = scores[0]
    var sum = 0
    
    for score in scores {
        if score > max {
            max = score
        } else if score < min {
            min = score
        }
        sum += score
    }
    
    return (min, max, sum)
}

let stats = calcStats(scores: [5, 3, 100, 3, 9])
let sum = stats.sum // 120

class Shape {
    var numberOfSides = 0
    func simpleDescription() -> String {
        return "A shape with \(numberOfSides) sides."
    }
}

var shape = Shape()
shape.numberOfSides = 7
var shapeDesc = shape.simpleDescription()