Swift: For-in loop non-inclusive upper on PlayGround

Question

I have just started playing with Swift. When using a Playground, according to Apple's iBook the following should work:

var firstForLoop = 0;

for i in 1..3 {
    firstForLoop += i;
}

However, the interpreter is complaining: "Use of unresolved identifier '..'" I have tried:

var firstForLoop = 0;

for i in 1...3 {
    firstForLoop += i;
}

and it works just fine (including the upper value in the loop). Has Apple removed the .. option from Swift's grammar?

Answer 1

.. is now ..<.

You're probably using an old version of the book.