input: Write a function to print the multiplication table of a given number n from 1 to 10.
  assert f(5) == None
  assert f(3) == None
  assert f(1) == None
  def f(n):
      for i in range(1, 11):
          print("{} * {} = {}".format(n, i, n*i))
output: def f(n):
      for i in range(1, 11):
          print("{} * {} = {}".format(n, i, n*i))