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iOS Swift 2.0 Basics Swift Types Recap: Swift Types

Posted by Nisa Andrews
Nisa Andrews
714 Points

How do I create a string that describes an operation?

I'm a bit confused...

Here's my code.

let firstValue = 1 let secondValue = 2

let product = 2

let output = ??

How do I write output to describe an operation?

Thanks!!

2 Answers

Eduardo Pinheiro
Eduardo Pinheiro
4,649 Points
Eduardo Pinheiro
Eduardo Pinheiro
4,649 Points

For the product constant, you need to actually calculate the first value times the second one, not just to type the result:

let product = firstValue * secondValue

For the output constant, you should use string interpolation to form a phrase with the numbers used and the product of them:

let output = "The product of \(firstValue) times \(secondValue) is \(product)"
// Will display "The product of 2 times 4 is 8"
Nisa Andrews
Nisa Andrews
714 Points
Nisa Andrews
Nisa Andrews
714 Points

Here's the question:

Given these two values we just declared, we want to compute the product and print out the product in a formatted string.

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.