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iOS

Posted by Evgenii Kireev
Evgenii Kireev
717 Points

While loops in Swift

Hello! I'm stuck! Please can somebody to help me with this task:
Now that we have the while loop set up, it's time to compute the sum! Using the value of counter as an index value, retrieve each value from the array and add it to the value of sum. For example: sum = sum + newValue. Or you could use the compound addition operator sum += newValue where newValue is the value retrieved from the array.https://teamtreehouse.com/library/swift-collections-and-control-flow/control-flow-with-loops/working-with-loops

Kenan Bateman
Kenan Bateman
16,715 Points
Kenan Bateman
Kenan Bateman
16,715 Points

Hi Evgenii,

I'm unsure where you might be hitting an issue without seeing your code, but the answer is 

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

3 Answers

Kenan Bateman
Kenan Bateman
16,715 Points
Kenan Bateman
Kenan Bateman
16,715 Points

Oh whoops my solution satisfied part 1, but to make it satisfy part 2 it'd be this -- 

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

For your code specifically, I think the issue is that it should be counter <=6 ....since on the 7th item, you'd be at numbers[6]

Evgenii Kireev
Evgenii Kireev
717 Points
Evgenii Kireev
Evgenii Kireev
717 Points

Hello Kenan! Thank you so much for your answer. This is my code: """let numbers = [2,8,1,16,4,3,9] var sum = 0 var counter = 0 while counter < 6 { sum += 1 }""" I created a loop. But i can not find the decision how to put my numbers isight of the loop that i could to sum of them. And i checked your answer, it does'not right - Bummer! Make sure your condition allows for iteration over all elements in the numbers array and check your calculation of sum!

Evgenii Kireev
Evgenii Kireev
717 Points
Evgenii Kireev
Evgenii Kireev
717 Points

Kenan thanks a lot for your code! Its really helped me!