diff --git a/Doc/library/stdtypes.rst b/Doc/library/stdtypes.rst
index a0b78f8053764b..ed777d1f634203 100644
--- a/Doc/library/stdtypes.rst
+++ b/Doc/library/stdtypes.rst
@@ -2261,6 +2261,19 @@ expression support in the :mod:`re` module).
    done using the specified *fillchar* (default is an ASCII space). The
    original string is returned if *width* is less than or equal to ``len(s)``.
 
+   For example:
+
+   .. doctest::
+
+      >>> 'Python'.ljust(10)
+      'Python    '
+      >>> 'Python'.ljust(10, '.')
+      'Python....'
+      >>> 'Monty Python'.ljust(10, '.')
+      'Monty Python'
+
+   See also :meth:`rjust`.
+
 
 .. method:: str.lower()