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iOS Swift 2.0 Collections and Control Flow Control Flow With Conditional Statements Working with Logical Operators

Posted by bastianstalder
bastianstalder
1,525 Points

Can't find the error in my code for this challenge

Ok, I've tested the following code snippet in a playground. I've then printed the results variable to see what I get. And everything seems to be okay. I get an array with the numbers 7, 21, 35, 49, 63, 77, 91 in it.

What's wrong with that?

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

for n in 1...100 {
    // Enter your code below
    if n % 2 == 1 && n % 7 == 0 {
        results += [n]
    }
    // End code 
}

2 Answers

Steve Hunter
Steve Hunter
57,712 Points

Hi Bastian,

I think the compiler is complaining that you are assigning a single-element array to the results array as you have surrounded n in square brackets.

You can just add n to the array with += or use the append() method.

My solution looks like:

var results: [Int] = []

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

So my code is pretty much the same as your, just without those square brackets.

Steve.

bastianstalder
bastianstalder
1,525 Points
bastianstalder
bastianstalder
1,525 Points

Thank you Steve for your hint. With the append method and no square brackets everything worked.