Sum an Array - Objective-C

Question

I\'m just starting out and I\'m looking for an easy way to sum a simple array. I\'ve read into apple developer site on key value coding and I don\'t understand how to apply

Answer 1

In Swift 4:

let array = [1,2,3,5]
let sum = array.reduce(0, {$0 + $1})
print(sum)