 
       iex> round(5.6)
       6
+
       iex> round(5.2)
       5
+
       iex> round(-9.9)
       -10
+
+      iex> round(-9)
+      -9
 
   """
   @spec round(float) :: integer

  end

  @doc """
  A non-local return from a function. Check `Kernel.SpecialForms.try/1` for more information.

  Inlined by the compiler.
  """

  end

  @doc """
  Returns the head of a list. Raises `ArgumentError` if the list is empty.

  Allowed in guard tests. Inlined by the compiler.

