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

Hasseeb Hussain
Hasseeb Hussain
2,154 Points
Posted by Hasseeb Hussain
Hasseeb Hussain
2,154 Points

Can't see the mistake I've made

What have I done wrong?

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

for n in 1...100 {
    if (n % 2 = 0) && (n % 7 = 0) {
        results.append(n)
    }
}

1 Answer

Jason Anders
MOD
Jason Anders
Treehouse Moderator 145,858 Points
Jason Anders
Jason Anders
Treehouse Moderator 145,858 Points

Hi Hasseeb,

You have two error (well, one error in two spots).

First, lets clear up the usage of the equal sign. A single equal sign (=) is an assignment operator, but you are trying to use it to compare values. For this, you need to be using the double equal sign (==).

Second, the challenge instructions explicitly ask to check for odd numbers, but you are trying to check for even numbers. So, for the first condition, you need to negate the answer using the bang (or "not") symbol (!). This will check and pass only if the modulus is not equal to zero.

Once those are fixed up, you get:

for n in 1...100 {
    if (n % 2 != 0) && (n % 7 == 0) {
        results.append(n)
    }
}

Keep Coding! :dizzy: