find the sum of all elements in an array in swift

To find the sum of all elements in an array in Swift, one way is to use the reduce method on the array.

Here is an example code snippet:

main.swift
let array = [1, 2, 3, 4, 5]
let sum = array.reduce(0, +)
print(sum) // Output: 15
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In this code, we have an array of integers [1, 2, 3, 4, 5]. We then call the reduce method on the array, passing in two arguments: an initial value of 0, and a closure which takes in two integers and returns their sum using the + operator.

The reduce method iterates over the array, adding each element to the running total, which starts at 0. The final result is the sum of all the elements in the array. We store this value in the sum constant and print it out to the console.