iOS Swift 3 Collections and Control Flow Control Flow With Loops Working With Loops

Walker Kinne
Walker Kinne
902 Points

Sum

Just curious why this code would fail?

If I pull into a playground I am able to get the sum perfectly

loops.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[index]
counter += 1

}

3 Answers

andren
andren
20,946 Points

The issue is that in this line:

sum += numbers[index]

You refer to a variable called index which does not exist. I'm assuming you meant to type counter instead. If you fix that typo then your code will work fine.

Matt Buckingham
Matt Buckingham
9,715 Points

If you use counter instead of index it should pass! Index is not defined in your code!

Walker Kinne
Walker Kinne
902 Points

Thanks for the help! It just clicked!