input: Write a function to print a staircase of height 'n', where n is an integer. The staircase should have 'n' steps, and each step should be displayed using the '#' character. Each step should also be right-aligned. If n is 0, the function should print an empty line.
  
  def staircase(n):
      for i in range(0, n):
          for j in range(0, n - i - 1):
              print(end=" ")
          for j in range(0, i + 1):
              print("#", end="")
          print()
  
  assert staircase(5)
  assert staircase(3)
  assert staircase(0)
  assert staircase(1)
output: def staircase(n):
      for i in range(1, n + 1):
          print(' ' * (n - i) + '#' * i)