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iOS

Posted by Antoinette Haste
Antoinette Haste
6,047 Points

Swift 2.0 Collections and Control Flow - Looping Over Ranges Video trouble

As I'm going through the exercise for Looping over Ranges, where you get Xcode to print a multiplication table of 5, I keep getting errors in the debug panel and can't figure out how my code is different from the instructor. I've gone back over the video twice and just can't seem to figure it out.

Here's my code:

for number in 1...10 { print("(number) times 5 is equal to \ (number * 5)") }

Does anyone see anything that is glaringly wrong here? Xcode just ain't havin none of it. ( :

Antoinette Haste
Antoinette Haste
6,047 Points

UPDATE: after some searching, I changed the formatting based on apple's Developer Library to:

for number in 1...10 { print("(number) times 5 is (number * 5)") }

and now the multiplication table is printing fine without errors. My guess is now that the version of Xcode used in the course video is a little older and that's why it would pass for the instructor, but not on my version of Xcode.

Anyone feel free to let me know if I'm wrong, but that's what I'm going to assume for now.

Martin Wildfeuer
Martin Wildfeuer
Courses Plus Student 11,071 Points

Hey there! I am curious:

The example from your update should not print the actual values, as \() is the way to add dynamic values to strings, so-called string interpolation. So this: 

for number in 1...10 {
   print("(number) times 5 is (number * 5)")
}

would actually print ten times (number) times 5 is (number * 5), whereas this

for number in 1...10 {
   print("\(number) times 5 is \(number * 5)")
}

should give you the expected output. Can you confirm?

Cheers Martin

Antoinette Haste
Antoinette Haste
6,047 Points

Thanks for looking at it Martin! I think I'm in over my head. Both the updated code and your code produced the same result in my version of Xcode. Here's what is shows in the debugger: 1 times 5 is 5 2 times 5 is 10 3 times 5 is 15 4 times 5 is 20 5 times 5 is 25 6 times 5 is 30 7 times 5 is 35 8 times 5 is 40 9 times 5 is 45 10 times 5 is 50 1 times 5 is 5 2 times 5 is 10 3 times 5 is 15 4 times 5 is 20 5 times 5 is 25 6 times 5 is 30 7 times 5 is 35 8 times 5 is 40 9 times 5 is 45 10 times 5 is 50

It's just crazy train. ( :

Maybe I just have to let this one go? LOL

I'm in Xcode version 7.2.1 if that helps.

PS- how do I make my code look nifty like yours?

Martin Wildfeuer
Martin Wildfeuer
Courses Plus Student 11,071 Points

I have no clue what kind of magic you are applying, but this is what I get with Xcode 7.3 ;) Swift

To write a code block, use three backticks followed by the language. To end a code block use three single backticks

Swift