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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

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

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

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