Selection sort for swift

selectionSort.swift

func selectionSort(_ array: [Int]) -> [Int]{
    var a = array
    for i in 0..<a.count - 1{
        var lowest = i
        for j in i+1..<a.count{
            if a[j] < a[lowest]{
                lowest = j
            }
        }
        if lowest != i{
            (a[i], a[lowest]) = (a[lowest], a[i])
        }
    }
    return a
}