Issue
What is the easiest (best) way to find the sum of an array of integers in swift?
I have an array called multiples and I would like to know the sum of the multiples.
Solution
This is the easiest/shortest method I can find.
Swift 3 and Swift 4:
let multiples = [...]
let sum = multiples.reduce(0, +)
print("Sum of Array is : ", sum)
Swift 2:
let multiples = [...]
sum = multiples.reduce(0, combine: +)
Some more info:
This uses Array’s reduce method (documentation here), which allows you to “reduce a collection of elements down to a single value by recursively applying the provided closure”. We give it 0 as the initial value, and then, essentially, the closure { $0 + $1 }. Of course, we can simplify that to a single plus sign, because that’s how Swift rolls.
Answered By – username tbd
Answer Checked By – Willingham (BugsFixing Volunteer)