Closure CaptureList

CaptureList.swift

//: Playground - Closures
import Foundation

class CaptureList: NSObject {
    let digit = 5
    
    override init() {
        super.init()
        
        makeSquareOfValue { [digit] squareDigit in
            print("Square of \(digit) is \(squareDigit)")
        }
    }
    
    func makeSquareOfValue(onCompletion: (Int) -> Void) {
        let squareDigit = digit * digit
        onCompletion(squareDigit)
    }
}

CaptureList()