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iOS Object-Oriented Objective-C Tying it All Together Cumulative Review

Andre Robinson
PLUS
Andre Robinson
Courses Plus Student 6,057 Points

Please help

I'm having trouble with syntax error

variable_assignment.mm
NSArray *temps = @[@75.5,@83.3,@96,@99.7];

  float average;
 float runningTotal;

  for (NSNumber in temps;)  average = temps++;  {
        average = runningTotal /[temps floatValue];
    }

2 Answers

Andre, you don't want to compute the average inside the loop. You need to get the total (runningTotal) of the items, and then do the division outside the loop:

    NSArray *temps = @[@75.5, @83.3, @96, @99.7];
    float average;
    float runningTotal;
    for (int i = 0; i < temps.count; i++) {
        runningTotal += [[temps objectAtIndex: i] floatValue];
    }
    average = runningTotal / temps.count;
Hannah Gaskins
Hannah Gaskins
14,572 Points

Hey Andre,

I just finished this exercise here and think I can help.

The for in loop you have there needs to have a named value. You can call it anything, but in mine below I called it 'tempItems"

NSArray *temps = @[@75.5, @83.3, @96, @99.7];
float average;
float runningTotal;

for (NSNumber *tempItems in temps) {
  runningTotal += [tempItems floatValue] ;
}

average = runningTotal/temps.count;

Hope that helps!