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

Lana Wong
Lana Wong
3,968 Points
Posted by Lana Wong
Lana Wong
3,968 Points

How do I solve this challenge using logical operators?

Instructions: Challenge Task 1 of 1

For this challenge, we'd like to know in a range of values from 1 to 100, how many numbers are both odd, and a multiple of 7.

To start us off, I've written a for loop to iterate over the desired range of values and named the local constant n. Your job is to write an if statement inside the for loop to carry out the desired checks.

If the number is both an odd number and a multiple of 7, append the value to the results array provided.

Hint: To check for an odd number use the not operator to check for "not even"

What is wrong with my code?

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

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

1 Answer

Steve Hunter
Steve Hunter
57,712 Points

Hi Lana,

You just have some brackets wrong there. And you've used a single = rather than comparing with double-equals:

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

I hope that helps.

Steve.