some_random_swift_script.swift

print("Hello World!")

let airports: [String : String] = [
    "SFO" : "San Francisco",
    "BOS" :  "Boston"
]

for (code, name) in airports {
    print("\(code) : \(name)")
}

func sayHello(name: String, msg : String) -> String {
    let message = "Hello \(name)"
    print(message)
    return message
}

sayHello(name : "Pramod", msg : "Stay Safe")

struct Course {
    let name : String
    let instructor : String
}

class Person {
    var name : String
    init(name : String) {
        self.name = name
    }
    func sayHello()
    {
        print("I'm \(name)")
    }
}

let person1 = Person(name : "Tommy")
person1.sayHello()


class Vehicle
{
    func wheels() -> Int {
        return 4
    }
    
    func go()
    {
        print("Zoom")
    }
}

class MotorCycle : Vehicle
{
    override func wheels() -> Int {
        return 2
    }
}

protocol Teacher {
    func teach();
}

var name: String?
if let n = name {
    print(n)
}
else
{
    print("No name")
}