"def quicksort(arr):
    """
    Sorts an array using the Quicksort algorithm.
    
    Parameters:
    arr (list): The list of elements to be sorted.
    
    Returns:
    list: The sorted list.
    """
    if len(arr) <= 1:
        return arr
    else:
        # Choose the last element as the pivot
        pivot = arr[-1]
        less = []
        greater = []
        for element in arr[:-1]:
            if element <= pivot:
                less.append(element)
            else:
                greater.append(element)
        # Recursively apply quicksort to sub-arrays
        sorted_less = quicksort(less)
        sorted_greater = quicksort(greater)
        # Combine the sorted sub-arrays and pivot
        return sorted_less + [pivot] + sorted_greater

# Example usage:
if __name__ == "__main__":
    sample_array = [3, 6, 8, 10, 1, 2, 1]
    sorted_array = quicksort(sample_array)
    print("Sorted array:", sorted_array)"