input: Write a function to filter out all the even numbers from a given list. If the list is empty, return an empty list.
  def filter_even_numbers(numbers):
      even_numbers = []
      for i in numbers:
          if i % 2 == 0:
              even_numbers.append(i)
      return even_numbers
  
  assert filter_even_numbers([3, 4, 5, 6, 7])==[4, 6]
  assert filter_even_numbers([])==[]
  assert filter_even_numbers([1, 3, 5, 7])==[]
  assert filter_even_numbers([2, 4, 6, 8])==[2, 4, 6, 8]
  assert filter_even_numbers([10, 11, 12, 13])==[10, 12]
output: def filter_even_numbers(numbers):
      even_numbers = []
      for i in numbers:
          if i % 2 == 0:
              even_numbers.append(i)
      return even_numbers