am not sure how to retrieve the value of number and add it to sum. A little help please?

Question

Am not sure how to retrieve the value of number and add it to sum.  A little help please?
```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 {
  counter += 1
}
```

Dave Harker · Accepted Answer

Hi Gabriel,
Just looking at the challenge. 
We're told that "The while loop should continue as long as the value of counter is less than the number of items in the array."
This can be accomplished with:
swift
while (counter < numbers.count) {

We then need to add each of the numbers in the array to the variable provided 'sum'. We can accomplish this with:
swift
// the counter is going to be in line with the array index, so we can use that to select / reference
// the numbers in the array as we 'count' through it
sum += numbers[counter]

Now we just need to increment the counter variable so we can move to the next element in the array; like this:
swift
// increment our counter by one and by extension increase the index reference in the numbers array 
// also for the next iteration through the while loop (if there is one)
counter += 1

And, close off the while loop:
swift
}

Done :) I hope that helps you make sense of it. Happy coding,
Dave

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Gabriel S

Gabriel S

am not sure how to retrieve the value of number and add it to sum. A little help please?

1 Answer

Dave Harker

Dave Harker

Gabriel S

Gabriel S

Dave Harker

Dave Harker