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 Collections and Control Flow Control Flow With Conditional Statements Working With Logical Operators

Aryaman Dhingra
Aryaman Dhingra
3,536 Points
Posted by Aryaman Dhingra
Aryaman Dhingra
3,536 Points

How to check if a number is a multiple of 7?

I'm trying this, but It's not working. HELP PLEASE

operators.swift 
var results: [Int] = []

for n in 1...100 {
    // Enter your code below
    if (n % 2 != 0) && (n/7 is Int) {
      results.append(n)
    }
    // End code 
}

1 Answer

Katie Wood
Katie Wood
19,141 Points

Hello there,

I was able to get this to pass by using the modulo(%) operator a second time, like this:

var results: [Int] = []

for n in 1...100 {
    // Enter your code below
    if (n % 2 != 0) && (n % 7 == 0) {
      results.append(n)
    }
    // End code 
}

Since it needs to be divisible by 7, there should be no remainder when divided, so the % operator works well.

Happy coding!

Chris Shaffer
Chris Shaffer
12,030 Points
Chris Shaffer
Chris Shaffer
12,030 Points

I have EXACTLY the same code and it gives this:

Bummer! Make sure you are performing logical checks in the condition of the if statement

Chris Shaffer
Chris Shaffer
12,030 Points
Chris Shaffer
Chris Shaffer
12,030 Points

Nevermind lol - I missed a space before my equals operator. Silly.

I've been writing JS for 5 years and still make simple mistakes like this. Happens to the best of us.

Katie Wood
Katie Wood
19,141 Points

It absolutely does happen to everyone - I'm not infallible either, so I appreciate you checking!

jenko
jenko
8,562 Points

Much appreciated. My math is generally pretty bad. But coming and check for this example helped :)