[swift-users] Usage of final let?

[Jens Alfke]

> On Jun 12, 2016, at 10:43 PM, Azuan via swift-users <swift-users at swift.org> wrote:
> 
> Read in docs, saying that by using final on variables, you can’t override it in it’s subclass. Using `final var` makes sense to me. But what is the purpose of using `final let` since by using `let`, it is already an immutable variable anyway.

Immutable isn’t the same as non-overridable. Immutable just means that its value in a single instance can’t be changed after initialization. But there’s nothing stopping you from creating a subclass that has a different value for that constant.

—Jens
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