input: Write a python function to sort an array in ascending order.
  assert sortAscending([5, 2, 9, 1, 5, 6]) == [1, 2, 5, 5, 6, 9]
  assert sortAscending([3, 0, -2, -1, 5, -6]) == [-6, -2, -1, 0, 3, 5]
  assert sortAscending([1, 2, 3, 4, 5]) == [1, 2, 3, 4, 5]
output: def sortAscending(arr):
      return sorted(arr)