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Aramik YOUSEFZADEH
Courses Plus Student 895 PointsI have defined a terminating condition but I still get error, what s wrong with my code?
In the while loop I said :
while counter =< numbers.count
and also did :
counter += 1
But i still get error
let numbers = [2,8,1,16,4,3,9]
var sum = 0
var counter = 0
// Enter your code below
while counter =< numbers.count {
sum = numbers[counter] + sum
counter += 1
}
1 Answer
Jennifer Nordell
Treehouse TeacherHi there! You simply have a typo. You've managed to transpose two characters. =< is not a valid comparison operator but <= is. If I make this teensy correction, your code passes with flying colors!
Hope this helps!
edited for additional note
Actually, I tried it again and was forced to change it to >= which I believe to be incorrect. I'm going to check this in playgrounds and if it is incorrect will tag the instructor.
edited again for correct answer
Besides having a syntax error by using =<, there is also a logic flaw. This loop should run only while counter is less than numbers.count. Remember that if counter goes up to the same number as the number of items it will result in an index out of range error. There are seven items in that array. But the seventh item resides at an index of 6 or numbers[6]. This means if you try and access numbers[7] you will get an out of range error as this index doesn't exist inside this array.
Jennifer Nordell
Treehouse TeacherJennifer Nordell
Treehouse TeacherPasan Premaratne could you take a peek at the challenge checker, please? These two while conditions pass where I feel like they shouldn't.
while counter > numbers.count {}while counter >= numbers.count {}Thanks!
Pasan Premaratne
Treehouse TeacherPasan Premaratne
Treehouse TeacherHey Jennifer Nordell
I get an error on
while counter >= numbers.count {}Admittedly the error is not descriptive and can be improved but I can't get it to pass
Jennifer Nordell
Treehouse TeacherJennifer Nordell
Treehouse TeacherPasan Premaratne I just meant the logic including the rest of the code. If I put in this challenge, it states "Well done! You're doing great!" even though the resulting value of sum would be equal to 0 as the loop is never executed. I tested it again just now to make sure.