[Swift] Bubble Sort. 버블 정렬. 오름차순

import Foundation

var line = readLine()       // Bubble Sorting

if let a = line {
    
    var arr = a.components(separatedBy: " ")
    
    for _ in 0..<arr.count {
        for j in 0..<arr.count-1 {
            
            if arr[j]>arr[j+1] {
                let temp = arr[j]
                arr[j] = arr[j+1]
                arr[j+1] = temp
                
                }
            }
        }
    
    print(arr)
}