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

I don't understand how to use sum.

I think I'm using sum correctly

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 {
print("hi")
counter += 1
}
while sum < numbers.count {
print(numbers[sum])
sum += 1
}

Its asking in the instructions only for one loop and you want to just use less than < not <= because the counter will go over. the instructions also say to use counter as the index not sum. and after you get the number from the index ad it to the sum.

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

// Enter your code below
while counter < numbers.count {
sum = sum + numbers[counter]
counter += 1
}

1 Answer

Nico Schmidt
Nico Schmidt
12,781 Points
 let numbers = [2,8,1,16,4,3,9]
var sum = 0
var counter = 0

// Enter your code below

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