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iOS Swift 2.0 Collections and Control Flow Control Flow With Loops Working with Loops

Darcy Phillips
Darcy Phillips
4,087 Points
Posted by Darcy Phillips
Darcy Phillips
4,087 Points

increment variable in while loop

Hi, I am being asked to construct a while loop that iterates over the elements of the "numbers" array, and increments the "counter" variable within the body of the loop. (This is the first step, so I haven't been asked to do anything else yet in the body of the loop. )

However, the system will not accept this. I've tried it every way I can think of, and can't figure out what I'm doing wrong. Thank you!

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 {
    counter += 1
}

1 Answer

Jennifer Nordell
seal-mask
STAFF
.a{fill-rule:evenodd;}techdegree
Jennifer Nordell
Treehouse Teacher
Jennifer Nordell
.a{fill-rule:evenodd;}techdegree
Jennifer Nordell
Treehouse Teacher

I don't know why this won't pass to be perfectly honest. But if I take your code and change the counter increment just slightly... it passes. Clearly they're looking for the increment operator even though they don't explicitly say so. Take a look:

while counter < numbers.count {
    counter++
}
Darcy Phillips
Darcy Phillips
4,087 Points
Darcy Phillips
Darcy Phillips
4,087 Points

Yes indeed. That's the one option I didn't try. Thank you very much.