input: Write a function to print a staircase of height 'n' where 'n' is an integer. The staircase should be right-aligned and made up of '#' characters. If the given integer is less than or equal to 0, the function should print nothing.
  def staircase(n): 
      if n <= 0:
          return
      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) == None
  assert staircase(0) == None
  assert staircase(3) == None
  assert staircase(10) == None
  assert staircase(-2) == None
output: def staircase(n): 
      if n <= 0:
          return
      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()