input: Write a function called print_greater_than_50 that takes a list of numbers as input and prints all the elements greater than 50. If the list is empty, the function should not print anything.
  
  assert print_greater_than_50([2, 60, 5, 4, 78, 32, 99])==None
  assert print_greater_than_50([])==None
output: def print_greater_than_50(numbers):
      for num in numbers:
          if num > 50:
              print(num)