Subscript.swift

import Foundation

// Subscript are used to access the information from collection, sequence and a list in classes, structures and enumerations

class DaysOfWeek {
    var days = ["Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", "Sunday"]
    
    subscript(index: Int) -> String {
        get {
            return days[index]
        }
        set {
            days[index] = newValue
        }
    }
}

let object = DaysOfWeek()
print(object[0]) // Monday