i dont really understand the question: Using the value of counter as an index value, retrieve each value from the array.

Question

please explain it to me what im being asked for and how to solve it. if possible, pls teach me why that is a solution for this problem. Thanks

while.swift

let numbers = [2,8,1,16,4,3,9]
var sum = 0
var counter = 0
while counter < numbers.count {
 print(numbers[counter])
    counter++
}



// Enter your code below

Answer 1 · 2016-09-28T05:37:02Z

September 28, 2016 5:37am

You have the while loop setup properly, so let's focus on step 2. Step 2 asks you to sum the numbers in the array.

Since you have a counter that starts at 0 and increments every time the loop is run, you will use the counter to reference each index location in the array. For instance, on the first loop, you would want to grab the first array item with numbers[0] and add it to the sum. Counter is zero. So you use the counter variable instead of zero: numbers[counter]. On the next loop iteration, counter is 1. So now the value from numbers[1] will be added to the sum (of course, the code represents this as numbers[counter], but the value of counter at the start of the second loop is 1. And so it goes as long as the counter is < numbers.count.

let numbers = [2,8,1,16,4,3,9]
var sum = 0
var counter = 0
while counter < numbers.count {
    sum += numbers[counter]
    counter++
}

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Yen Ho

Yen Ho

i dont really understand the question: Using the value of counter as an index value, retrieve each value from the array.

1 Answer

David Papandrew

David Papandrew