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iOS Swift 2.0 Enumerations and Optionals Introduction to Optionals Optional Values

Posted by Matt Conway
Matt Conway
1,572 Points

Variable

Cant seem to get this right ...

Challenge Task 1 of 1

Declare a variable named someValue of type optional Int and assign nil.

Note: You will have to explicitly declare the type as an optional Int otherwise the compiler cannot infer it.

optionals.swift 
let variable = someValue: Int == nil

1 Answer

jcorum
jcorum
71,830 Points 
var someValue: Int? = nil

You declare a variable using the var keyword. You give it a name: someValue. Then, following the : you indicate the type, which here is Int?, or an optional Int. Then you assign nil.

jenko
jenko
8,562 Points

It's easy to forget to delcare the type. This had me held up for quiet a bit.

Time to head back and refresh my knowladge on basics I think!