BubbleSort.swift

// Using Playground
func bubbleSort(_ numbers: Array<Int>) -> Array<Int>
{
  var nums = numbers
  
  if (nums.count <= 1) { return nums }
  
  for i in 0..<nums.count {
    for j in 0..<(nums.count - i - 1) {
      if (nums[j+1] < nums[j]) {
        let temp = nums[j]
        nums[j] = nums[j+1]
        nums[j+1] = temp
      }
    }
  }
  
  return nums
}

var array = [5,4,3,2,1]
let sorted = bubbleSort(array)
print("Bubble sort result: ")
print(sorted)