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

Posted by Sean Keating
Sean Keating
Courses Plus Student 3,497 Points

working with loops recaping on challenge part 2 retrieving from inside the array

2 different people have the the same problem but got help where it was not the main or what I needed.

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

// Enter your code 
while counter < 7 {
 counter += 1
  var newValue = numbers[index]
sum += newValue
}
Sean Keating
Sean Keating
Courses Plus Student 3,497 Points

I took out

var newValue = numbers[index]

but thats the main part I working on

1 Answer

Daniel Medina
Daniel Medina
13,863 Points
Daniel Medina
Daniel Medina
13,863 Points

It looks like your loop is slightly off.

The problem is that you don't have a variable for index declared either inside or outside of your loop.

Honestly, you don't even need a separate index variable. You can use your counter instead and save yourself some extra work.

Change what you have here

while counter < 7 {
    counter += 1
    var newValue = numbers[index]
sum += newValue
}

to this

while counter < 7 {
    sum += numbers[counter]
    counter += 1
}

This lets you step through your array, add up the numbers, and increment your counter.

Sean Keating
Sean Keating
Courses Plus Student 3,497 Points

Wow that was it! I've been staring at this page for months LoL