Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

iOS Swift Basics Swift Operators Working With Operators

Posted by Anthony Reymond
Anthony Reymond
329 Points

I'm stuck in task 2 in swift basics "operators"

task 2

I just don't know what to do, the question isn't clear?

result == someOperation result =< anotherOperation isPerfectMultiple == someOperation

operators.swift 
// Enter your code below
let value = 200
let divisor = 5


let someOperation = 20 + 400 % 10 / 2 - 15
let anotherOperation = 52 * 27 % 200 / 2 + 5

// Task 1 - Enter your code below
let result = 200 % 5


// Task 2 - Enter your code below
result == someOperation
result =< anotherOperation
isPerfectMultiple == someOperation
clarkbridgewater
clarkbridgewater
5,519 Points

Hey there so the question I believe you are stuck on is:

Step 2: When value obtained using a remainder operator is 0, this means that the value is a perfect multiple of the divisor. Compare the value of result to 0 using the equality operator and assign the resulting value to a constant named isPerfectMultiple.

So in confusing questions like this I like to break it down in pieces.

  1. When VALUE obtained using a remainder operator is 0.
  2. This means that the value is a perfect multiple of the divisor. 3 Compare the value of RESULT to 0 using the == operator and assign the RESULT value. 4 Constant named isPerfectMultiple.

a. Constant: isPerfectMultiple.

let isPerfectMultiple

and the value of RESULT is 0

result == 0.

let isPerfectMultiple = result == 0

Hope this has helped

1 Answer

Addison Francisco
Addison Francisco
9,561 Points
Addison Francisco
Addison Francisco
9,561 Points

Hi, Anthony. Let's see if we can clarify the questions asked for this challenge.

Step 1: Using the remainder operator, compute the remainder given the value and a divisor. Assign this value to a constant named result.

So, as you have learned in the Arithmetic Operators video, we can use a modulo operator (%) to get the remainder of a number and divisor. For this challenge, they have asked you to get the remainder of the declared variables value and divisor, then assign the remainder of this operation to a constant variable named result. I'll break this into 2 steps so it's a little more clear what is happening. First, we want to get the remainder of value and divisor. 

// Calculate the remainder by using a modulo
value % divisor

This is the same as 200 % 5, which returns 0 because 200 / 5 has no remainder. Second, we want to assign the remainder to a constant variable named result. We can do this by modifying the above...

// Calculate the remainder by using a modulo AND assign the remainder of value and divisor to a constant var named result
let result = value % divisor

Now we have a variable named result that holds the remaining value of value % divisor. We can now address Step 2.

Step 2: When value obtained using a remainder operator is 0, this means that the value is a perfect multiple of the divisor. Compare the value of result to 0 using the equality operator and assign the resulting value to a constant named isPerfectMultiple.

First, as they have asked, let's compare result to 0 using the equality operator.

// Is result the same value as 0? We can find out by using the equality operator
result == 0

result's value is 0. So, comparing (==) result against 0 will return true.

Second, we want to assign the returned value of this comparison to a constant variable named 'isPerfectMatch'. Here's how...

let isPerfectMultiple = result == 0

What this is doing is first comparing result with 0, which equals true because result's value is also 0. Then it is taking that true value and assigning it to isPerfectMultiple. So, now we have a var named isPerfectMultiple that equals true, just as they asked.

Our code should now look like this...

// Enter your code below
let value = 200
let divisor = 5

let someOperation = 20 + 400 % 10 / 2 - 15
let anotherOperation = 52 * 27 % 200 / 2 + 5

// Task 1 - Enter your code below
let result = value % divisor
// Task 2 - Enter your code below
let isPerfectMultiple = result == 0

Hope this was helpful for you, Anthony. Keep coding!