Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

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

dhari alaradah
dhari alaradah
3,127 Points
Posted by dhari alaradah
dhari alaradah
3,127 Points

please help me to solve it

i can not solve it please help me to solve it regards

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 {
sum += numbers[0]
sum += numbers[1]
sum += numbers[2]
sum += numbers[3]
sum += numbers[4]
sum += numbers[5]
sum += numbers[6]
counter++

}

1 Answer

Fuad Adetoro
seal-mask
.a{fill-rule:evenodd;}techdegree
Fuad Adetoro
iOS Development Techdegree Student 11,599 Points
Fuad Adetoro
.a{fill-rule:evenodd;}techdegree
Fuad Adetoro
iOS Development Techdegree Student 11,599 Points

The reason for the while loop is so that it loops through the array, let's say it was real data and an extra integer was added to that array your code wouldn't work. You should use counter as the index instead.

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

// Enter your code below
while counter < numbers.count {
    sum += numbers[counter]
    counter++
}

When you go to the next course, functions you'll hear DRY, Don't Repeat Yourself.