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

Chris Guyton
Chris Guyton
972 Points

I don't understand how to pass this task

Task 2 of 2 asks: Now that we have the while loop set up, it's time to compute the sum! Using the value of counter as an index value, retrieve each value from the array and add it to the value of sum.

For example: sum = sum + newValue. Or you could use the compound addition operator sum += newValue where newValue is the value retrieved from the array.

// Code provided

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

// I passed the first part with this piece of code // Enter your code below while counter <= 0 { // < ---- I passed the first part with this piece of code print("sum") counter += 9 }

while counter > numbers.count { sum = sum + numbers[counter] counter ++ // <---- This is my second piece of code after looking through help... no luck }

This is really frustrating, I can't get a pass no matter what. Is this for real?

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

// Enter your code below
while counter <= 0 {
print("sum")
counter += 9
}

while counter > numbers.count {
sum = sum + numbers[counter]
counter ++
}

4 Answers

Jeff McDivitt
Jeff McDivitt
23,970 Points

Hi Chris - The answer is below

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

Chris Guyton
Chris Guyton
972 Points

Jeff, that solution isn't working.

Chris Guyton
Chris Guyton
972 Points

Now it's working, nvm! Thanks!

Kyle Johnson
Kyle Johnson
33,528 Points

This will complete both steps of the challenge!

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 += 1
}