input: Write a function to take a list of numbers from 1 to 8 and print each number's cubic value. The function should iterate through the list, compute the cube of each number, and print the result. If the list is empty, the function should print nothing.
  assert print_cubic_values([1, 2, 3, 4, 5, 6, 7, 8]) == None
  assert print_cubic_values([]) == None
output: def print_cubic_values(numbers):
      for num in numbers:
          print(num ** 3)