diff -r 3ae2cd85a908 Doc/library/functions.rst
--- a/Doc/library/functions.rst	Sun Mar 09 11:18:16 2014 +0100
+++ b/Doc/library/functions.rst	Sat Mar 15 14:17:57 2014 -0400
@@ -617,9 +617,19 @@
 
 .. function:: hex(x)
 
-   Convert an integer number to a hexadecimal string. The result is a valid Python
-   expression.  If *x* is not a Python :class:`int` object, it has to define an
-   :meth:`__index__` method that returns an integer.
+   Convert an integer number to a lowercase hexadecimal string
+   prefixed with "0x", for example:
+
+      >>> hex(255)
+      '0xff'
+      >>> hex(-42)
+      '-0x2a'
+
+   If x is not a Python `int` object, it has to define an __index__()
+   method that returns an integer.
+
+   See also :func:`int` for converting a hexadecimal string to an
+   integer using a base of 16.
 
    .. note::