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# Challenge Task 2 - I have the right code

Okay, so this is actually correct, but it was kind of a guess. The reason for this post is to make sure I'm understand what this code is doing. And forgive me, I'm going to break this down one line at a time just to be sure I understand.

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

while counter < numbers.count { - This is saying that numbers.count array is less than the counter, correct?

sum += numbers[counter] - This line I guessed :/ but I think it's saying sum is equal to the the numbers in the array?

counter++ - With this, this is adding a +1 to the counter, where the number amount in the array is stored, and added to sum variable, and will continue to go through this loop until counter is greater than the numbers array?

}

while.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++

}
```

while counter < numbers.count { - This is saying that numbers.count array is less than the counter, correct?

Not quite. numbers.count returns the size of the numbers array, and the while loop runs as long as counter is less than that count. Perhaps that is what you meant. But you say numbers.count is an array and it isn't. It's an Int.

sum += numbers[counter] - This line I guessed :/ but I think it's saying sum is equal to the the numbers in the array?

Again, not quite. It is saying to give sum the value of sum plus the value of numbers[counter]. This is shorthand for this longer version: sum = sum + numbers[counter]

counter++ - With this, this is adding a +1 to the counter, where the number amount in the array is stored, and added to sum variable, and will continue to go through this loop until counter is greater than the numbers array?

It's just adding 1 to counter, or as some say, it is incrementing counter by 1.

I appreciate you responding back.

Thank you