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Start your free trialChristopher Mosera
366 PointsWhy don't I have to use the \() to interpolate?
In the Thinking About Types excercise within the Manipulating Data practice sessions there is code similar to the following:
var isReady = true isReady = false
let value = 10 let valueTimesThree = value * 3
let name = "Pasan" let lastName = "Premaratne"
In the second section, I would assume that in order to use the value constant within the valueTimesThree constant I would have had to write it like this, 'backslash'(value). Why don't I need to do this?
1 Answer
andren
28,558 PointsThe \() syntax is used to insert a variable within a string, it makes it clear to Swift that you are referencing a variable and not just typing normal text. Outside of strings that distinction is not needed, as Swift assumes that all words typed is either a keyword, variable or something similar.
That means that whenever you want to reference a variable outside a string you simply have to type its name, nothing more. This is true regardless of whether the variable is used in a math operation, passed to a function or pretty much anything else.