#!/usr/bin/env python3 def selection_sort(arr): for i in range(len(arr)): print(i, ': ', l) # index of the minimum index minx = i for j in range(i+1, len(arr)): if arr[j] < arr[minx]: minx = j # Swap values tmp = arr[minx] arr[minx] = arr[i] arr[i] = tmp array = [15, 7, 20, -5, 3, 2, 19, 18, 21] selection_sort(array) print(array)