input: Write a function to generate a staircase of height 'n' using the '#' character, where 'n' is an integer. The staircase should be right-aligned. If the given value of 'n' is 0, the function should return without printing anything.
  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("\r")
  
  assert staircase(5) == None
  assert staircase(0) == None
  assert staircase(3) == None
output: 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("\r")