input: Write a function f(n) that takes an argument n and prints the multiplication table of n.
  
  def f(n):
      for i in range(1, 11):
          print("{} * {} = {}".format(n, i, n*i))
  
  assert f(5) == None
  assert f(1) == None
output: def f(n):
      for i in range(1, 11):
          print("{} * {} = {}".format(n, i, n*i))