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

John Gilmer
PLUS
John Gilmer
Courses Plus Student 3,782 Points

I am confused on the last part

?

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 {
print("Works")
counter += 1
sum += numbers

}

1 Answer

István Halász
István Halász
2,896 Points

Hi John!

The problem in your code is that you are trying to add the whole array to the sum variable and not just an element of the array. Your code should look like this:

let numbers = [2,8,1,16,4,3,9]
var sum = 0
var counter = 0

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

Within the while loop, you add the array's first value to the sum, because the counter is 0 and in arrays the first element is always marked with 0 then second is 1, the third is 2 and so on. So after you added the first element you need to update the counter to add the second element next time when you run the loop. I hope I could help with your problem!