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Start your free trialKristopher Wood
iOS Development Techdegree Student 5,552 PointsLost on how to retrieve the value from the array
Would appreciate help on this one. Not sure how to finish this off and retrieve the value from the array. Thanks
let numbers = [2,8,1,16,4,3,9]
var sum = 0
var counter = 0
// Enter your code below
while counter < numbers.count {
print("\(numbers) + \(numbers)")
counter += 1
}
repeat {
print ("sum = sum + numbers)
counter += 1
} while counter < 1
2 Answers
Alex Koumparos
Python Development Techdegree Student 36,887 PointsHi Kristopher,
First, you don't need any of the repeat
block, so let's just delete that to get your plain while
loop:
while counter < numbers.count {
print("\(numbers) + \(numbers)")
counter += 1
}
Now, we need to replace the print
statement you have right now with code to perform the actions from the challenge:
1: "Using the value of counter as an index value, retrieve each value from the array"
So this means we need to access the values in numbers
with counter
. Accessing the values in an array was handled back in Introduction to Collections. Or if you want a text-based refresher on accessing arrays, you can look at Apple's (very readable) Swift Language Guide.
2: "add it to the value of sum"
Once we have the value from the array we just add that to the existing value. The challenge gives examples of syntax for doing this, either:
sum = sum + newValue
or
sum += newValue
Where newValue
is the value you got from the array.
Hope this helps. If you're still stuck after revisiting the Introduction to Collections video and/or reading Apple's guide to arrays, let me know which bit you don't get and I'll give you some more pointers.
Cheers
Alex
Kristopher Wood
iOS Development Techdegree Student 5,552 PointsThanks Alex! I really appreciate the help