input: Write a function to sort an array in ascending order. The function should be named sort_ascending and take one parameter, which is the array to be sorted. The function should return the sorted array.
  
  def sort_ascending(array):
    array.sort()
    return array
  
  sort_ascending([10, 3, 9, 1, 15, 2])  # [1, 2, 3, 9, 10, 15]
output: def sort_ascending(array):
    array.sort()
    return array