diff --git a/Doc/library/functions.rst b/Doc/library/functions.rst
index ef4176a..a385002 100644
--- a/Doc/library/functions.rst
+++ b/Doc/library/functions.rst
@@ -80,8 +80,27 @@ are always available.  They are listed here in alphabetical order.
 
 .. function:: bin(x)
 
-   Convert an integer number to a binary string. The result is a valid Python
-   expression.  If *x* is not a Python :class:`int` object, it has to define an
+   Convert an integer number to a binary string prefixed with "0b". 
+   The result is a valid Python expression, for example:
+
+      >>> bin(3)
+      '0b11'
+      >>> bin(-10)
+      '-0b1010'
+
+   It can also be done by using the expression:
+
+      >>> "{0:#b}".format(3)
+      '0b11'
+
+   If prefix "0b" is not desired, you can use either of the following ways:
+
+      >>> "{0:b}".format(3)
+      '11'
+      >>> format(3, 'b')
+      '11'
+
+   If *x* is not a Python :class:`int` object, it has to define an
    :meth:`__index__` method that returns an integer.
 
 
@@ -634,6 +653,26 @@ are always available.  They are listed here in alphabetical order.
       >>> hex(-42)
       '-0x2a'
 
+   It can also be done by using the expression:
+
+      >>> "%#x" % 255
+      '0xff'
+
+   If you want to convert an integer number to an uppercase hexadecimal string
+   prefixed with "0X":
+
+      >>> "%#X" % 255
+      '0XFF'
+
+   If prefix "0x" is not desired, you can use either of the following ways:
+
+      >>> format(255, 'x')
+      'ff'
+      >>> "{0:x}".format(255)
+      'ff'
+      >>> f'{255:x}'
+      'ff'
+
    If x is not a Python :class:`int` object, it has to define an __index__()
    method that returns an integer.
 
@@ -865,8 +904,25 @@ are always available.  They are listed here in alphabetical order.
 
 .. function:: oct(x)
 
-   Convert an integer number to an octal string.  The result is a valid Python
-   expression.  If *x* is not a Python :class:`int` object, it has to define an
+   Convert an integer number to an octal string prefixed with "0o".  The result 
+   is a valid Python expression, for example:
+
+      >>> oct(8)
+      '0o10'
+
+   It can also be done by using the expression:
+
+      >>> "{0:#o}".format(8)
+      '0o10'
+
+   If prefix "0o" is not desired, you can use either of the following ways:
+
+      >>> format(8, 'o')
+      '10'
+      >>> "%o" % 8
+      '10'
+
+   If *x* is not a Python :class:`int` object, it has to define an
    :meth:`__index__` method that returns an integer.