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  • What is an Optional meant in Swift?

    @jasvinder.singh
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    Hi Readers!

    An Optional is just an enum in Swift.

    enum Optional<T> {
    case None
    case Some(T)
}

    Here <T> is generic similar to an Array<T>

    <T> could be anything like Strings, Dictionary, Array etc.

    Here are some examples:

    Example 1:

     let a1 : String? = nil

    is similar to 

    let a1 = Optional<String>.None

    Example 2:

     let s2 : String? = "hello"

    is similar to 

    let s2 : String? = Optional<String>.Some("Hello")

    Example 3:

    let a : Array? = ["hello","hi"]

    is similar to

    let a = Optional.Some(["hello","hi"])

    I hope this explains what optionals are.

    swift Optional Optionals enumeration
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