Classic: Selection Sort

Question:

Please implement Selection sort, which is a simple and basic sorting algorithm. It is not very fast. Its complexity is O(n^2).


Answer:

def selection_sort(arr):
  n = len(arr)
  for i in range(n):
    for j in range(i+1, n):
      # if not in ascending order, swap
      if arr[i] > arr[j]:
        arr[i], arr[j] = arr[j], arr[i]
  return arr

# call the function
input = [8, 3, 2, 8, 5, 4, 6, 7, 2, 6, 4, 0, 9, 4, 6, 5, 8]
print(selection_sort(input))

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