input: Write a function that takes a list of numbers as input and prints all the elements greater than 50. If the list is empty, the function should print nothing.
  assert greater_than_50([2, 60, 5, 4, 78, 32, 99])==None
  assert greater_than_50([3, 51, 55, 49, 70])==None
  assert greater_than_50([100, 200, 300])==None
  assert greater_than_50([50, 40, 30])==None
  assert greater_than_50([])==None
output: def greater_than_50(numbers):
      for num in numbers:
          if num > 50:
              print(num)