input: Write a python function to return a list of multiples of 5 up to a given number.
  assert myfunc(50) == [0, 5, 10, 15, 20, 25, 30, 35, 40, 45]
  assert myfunc(100) == [0, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95]
  assert myfunc(0) == []
  assert myfunc(10) == [0, 5]
output: def myfunc(n):
      return [i for i in range(0, n, 5)]