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bong zi jiang
616 Pointscan help me i still get it by video from first to end can someone explain more simple
need help i don know how to say please someone explain to me
var str : string = "language"
let language : string = "Swift"
var greeting = str + language
3 Answers
jcorum
71,830 PointsCorrect. But you can write it this way as well:
let language: String = "Swift"
It's just that you don't have to, as Swift can tell that you are assigning a String to the variable.
Re class/type, here's a quote from the Swift documentation: "A string is a series of characters, such as "hello, world" or "albatross". Swift strings are represented by the String type."
String is a type, so it needs to be capitalized, just as Bool and Int and Double do.
Classes you write are also types, so some folk use type and class pretty much as if they were synonyms, but that's not quite correct since in Swift as structs, enums and protocols are also types. Anyway, they all must be capitalized.
jcorum
71,830 PointsFirst, this line
let language : string = "Swift"
fails because String must be capitalized (it's a class). Also, you don't need to give the type (class) as Swift can infer it from the value you are assigning the constant.
Second, the challenge doesn't ask you to create a variable greeting.
So all you need is this:
let language = "Swift"
bong zi jiang
616 Pointswhat is mean for (it's a class) is small letter?
so i just need write like this?
let language ="Swift"
bong zi jiang
616 Pointscan i follow you profile at treehouse?