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iOS Swift Collections and Control Flow Control Flow With Loops Working With Loops

Ohad B
Ohad B
4,869 Points
Posted by Ohad B
Ohad B
4,869 Points

Summing process not working

Hi, I cant figur out why my answer is not the correct here.

Shouldn't the while loop work properly (and sum the variables of the numbers array)?

let numbers = [1,2,3,4,5,6] var sum = 0 var counter = 0

while counter <= numbers.count { sum += numbers[counter] counter += 1 }

loops.swift 
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]
counter += 1
}

1 Answer

Steve Hunter
Steve Hunter
57,712 Points

Hi there,

You don't want counter to be equal to numbers.count as that'll exceed the length of the array. So, loop while counter is less than numbers.count. Just delete the equals sign from your <= and your code is fine!

With it in there, you would try to access numbers[7] which would throw an out of bounds exception.

Steve.