I pasted your code into the challenge and got this error message: "Make sure your variable is named language!" and that's exactly that the problem is, you've called the variable str instead of language.

I still don’t get it

No I already pass the challenge, now I’m in the second one and in my computer Xcode I trying to put the code and in the right side the answer doesn’t appears

It happens from time to time... Quit Xcode and give 'er another shot.

Hi Ronald,

In X Code 10 the code no longer automatically "evaluates" thus providing the results in the right-hand side. It's quite annoying.

Try pressing Shift + Enter or if you see a blue Play icon in the gutter on the left side, click that to see the results.

Unfortunately, the iOS course material has not yet been updated to reflect this change.

Best of luck!