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iOS Swift 2.0 Basics Swift Types Recap: Swift Types

Giuseppe Privitera
Giuseppe Privitera
4,078 Points
Posted by Giuseppe Privitera
Giuseppe Privitera
4,078 Points

[HELP] This interpolated program works perfectly on my mac; I don't comprehend what the challenge wants me to do.

The is what it keeps saying: "The format of your output string doesn't match the requirements listed. Double check the example given in the directions!"

types.swift 
let firstValue: Int = 2

let secondValue: Int = 4

let product = firstValue * secondValue

let a: String = "The product of "

let b: String = "times"

let c: String = "is"


let output = "\(a) \(firstValue) \(b) \(secondValue) \(c) \(product)"
Giuseppe Privitera
Giuseppe Privitera
4,078 Points
Giuseppe Privitera
Giuseppe Privitera
4,078 Points

Instructions: Step 1: Declare a constant named product and assign the result of multiplying firstValue and secondValue together. (To multiply two values, a and b, we write a * b).

Step 2: Using string interpolation, create a string literal that describes the operation we just performed. For example, given the following values for firstValue, secondValue and product respectively: 2, 4, 8. The string should read: "The product of 2 times 4 is 8". Assign this string to a constant named output.

1 Answer

Rodrigo Chousal
Rodrigo Chousal
16,009 Points
Rodrigo Chousal
Rodrigo Chousal
16,009 Points

Hey Giuseppe!

I haven't personally done this challenge yet, but I might have an idea on where your problem lies. You are not really using string interpolation when initialising your constant output.

Try this instead, see if it works:

let output =  "The product of  \(firstValue) times \(secondValue) is \(product)"

The documentation defines string interpolation as: "... a way to construct a new String value from a mix of constants, variables, literals, and expressions by including their values inside a string literal. "

This is why I think you need a combination of hardcoded strings and placeholders to complete the challenge. Might be wrong, though. I haven't tried it!

You can find more information on string interpolation here.

Giuseppe Privitera
Giuseppe Privitera
4,078 Points
Giuseppe Privitera
Giuseppe Privitera
4,078 Points

I have already tried doing it that way, but it keeps saying "The format of your output string doesn't match the requirements listed. Double check the example given in the directions" I don't get it... everything looks right to me