class Car {
    var name: String
    let model: String
    let color: String
 
    init(name: String, model: String, color: String) { // In Class, we need to implement `init` which is a constructor but in struct, it is not necessary 
        self.name = name
        self.model = model
        self.color = color
    }
}
 
let ford = Car(name:"Ford", model:"2010", color:"Red")
 
// Ford instance share his reference to Ferrari i.e Ferrari and Ford both having same copy of data i.e pointing to the same reference 
// We declared `ferrari` instance using `let` (immutable now). In class, we can always change it's variable (But variable should be declared as `var` then only it is possible)
 
let ferrari = ford 
 
ferrari.name = "Ferrari"
 
print(ford.name) // Output : Ferrari (Because ford referring to same reference point which ferrari has)
print(ferrari.name) // Output : Ferrari

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