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Gabriel Spranger Rojas
7,350 PointsIdk what's wrong
I've done everything that is asked. But I keep getting an error. Please help.
let numbers = [2,8,1,16,4,3,9]
var sum = 0
var counter = 0
// Enter your code below
while counter < numbers.count - 1 {
var newValue = numbers[counter]
sum += newValue
counter += 1
}
2 Answers
Jennifer Nordell
Treehouse TeacherHi there! You're so close on this one! The problem here lies in that you're not counting the very last element of the array. This is the line responsible:
while counter < numbers.count - 1
Keep in mind that the numbers array has a count of 7. There are seven items in the array. We want to count from zero to six and then stop. This line says to do this code while counter is less than 6. Given that the last element is in position 6, what happens to this evaluation? When counter reaches 6, then it will not be less than the count - 1 but rather equal to it, and the last iteration for the last item doesn't happen.
But this is easily fixed!
while counter < numbers.count
When the iteration reaches 6, it will still go out and add the number at position numbers[6], which is totally valid. You just need to get rid of the -1 in the opening condition of your while.
Hope this helps!
edited for additional note
In your effort to not go outside the boundaries of the array, you accidentally omitted the last item from the calculations.
Gabriel Spranger Rojas
7,350 PointsThat was the problem. Thank you very much!