input: Write a python function to compute the root mean square (RMS) of a list of numbers.
  assert rms([1, 2, 3, 4, 5]) == 3.3166247903554
  assert rms([10, 20, 30, 40, 50]) == 32.01562118716424
  assert rms([0, 3, 4]) == 2.6457513110645907
output: def rms(numbers):
      import math
      n = len(numbers)
      if n == 0:
          return 0
      square_sum = sum(x ** 2 for x in numbers)
      mean_square = square_sum / n
      return math.sqrt(mean_square)