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iOS Swift 2.0 Basics Swift Types Recap: Swift Types

Raymond Espinoza
Raymond Espinoza
1,989 Points
Posted by Raymond Espinoza
Raymond Espinoza
1,989 Points

swift types

How do you get the firstValue = 2 and second value =4 to equal 8 and put it into string interpolation ?

types.swift 
// Enter your code below
let firstValue = 2
let secondValue =4
Roman Lopez
Roman Lopez
2,211 Points

Hi Raymond I'll like to give this a try...

In this question the keyword you are looking for is "interpolation". When you interpolate two strings. You add the strings together. 

it should look something like this...
let firstValue = 2
let secondValue = 4

let fullValue =  firstValue * secondValue

Swift is so smart that with the constant name along is enough for Xcode to recognize its value! :) I hope it helps.

-roman

Raymond Espinoza
Raymond Espinoza
1,989 Points
Raymond Espinoza
Raymond Espinoza
1,989 Points

i know that but how do i compute the product and print out the product in a formatted string?The string should read: "The product of 2 times 4 is 8".

1 Answer

Steve Hunter
Steve Hunter
57,712 Points

Hi Raymond,

It is correct that you need to interpolate strings to complete this exercise. The word interpolate means to insert. Adding strings together is generally termed concatenation - other, simpler, words are available!

You have started by creating your two values, firstValue and secondValue. That's great. Not, you want to create a further constant called product which holds firstValue * secondValue. Got that? Something like:

let product = firstValue * secondValue

You then need to output all that in a string. You're given the string in the challenge: "The product of 2 times 4 is 8". Now we use interpolation! The 2, 4 and 8 in that string are all held in constants in our code. We can insert them by using a backslash, brackets and the variable name - just like in the videos. Assign that new string into another constant called output. The final code looks like:

let firstValue = 2
let secondValue = 4
let product = firstValue * secondValue
let output = "The product of \(firstValue) times \(secondValue) is \(product)"

Let me know if that doesn't work for you!

Steve.