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Start your free trialdavema
2,836 PointsWhat is the correct answer?
What am I doing wrong here? This code seems to work in Xcode to determine the average.
NSArray *temps = @[@75.5, @83.3, @96, @99.7];
float average;
float sum = 0;
for (NSNumber *number in temps) {
sum = sum + [number floatValue];
average = sum/temps.count;
}
3 Answers
jcorum
71,830 PointsThis was one of the strangest things. The only error I could see with your code is that you were computing the average inside of the loop. So I tried this:
NSArray *temps = @[@75.5, @83.3, @96, @99.7];
float average;
float sum;
for (NSNumber *number in temps) {
sum += [number floatValue];
}
average = sum/temps.count;
and the Editor said I was trying to redefine sum!!??
So I tried this:
NSArray *temps = @[@75.5, @83.3, @96, @99.7];
float average;
float sumx;
for (NSNumber *number in temps) {
sumx += [number floatValue];
}
average = sumx/temps.count;
and the Editor accepted it. Wow!
Happy coding.
Jason Anders
Treehouse Moderator 145,860 PointsI encountered this as well. "sum" is not a reserved keyword as far as I know, so I am wondering if this has something to do with the code checker for the challenge. Maybe Gabe Nadel could provide some insight on why 'sum' produces an error.
Gabe Nadel
Treehouse Guest TeacherIndeed, this was an issue with our code challenge engine. I've changed the question a bit so it should be ok going forward. Thanks y'all for helping to make this experience better and better!