input: Write a function to print a staircase of height 'n', where n is an integer. Each step of the staircase should be made up of '#' characters, with preceding spaces to align the staircase to the right. If the given height 'n' is 0, the function should print nothing.
  
  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
  assert staircase(7) == None
  assert staircase(1) == 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()