find the average of all elements in an array in swift

main.swift
let numbers = [1, 2, 3, 4, 5]

let sum = numbers.reduce(0, +) // sum up all the elements in the array

let average = Float(sum) / Float(numbers.count) // divide by the number of elements in the array

print("The average is: \(average)")
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8 lines

main.swift
The average is: 3.0
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2 lines