input: Write a python function to prepend a number to each element in a list of strings.
  assert modified_list(2, ["Hello", "World"]) == ["2Hello", "2World"]
  assert modified_list(5, ["Test", "Sample"]) == ["5Test", "5Sample"]
  assert modified_list(0, ["Python", "Code"]) == ["0Python", "0Code"]
output: def modified_list(number, strings):
      return [f"{number}{string}" for string in strings]