{% for user in users|reverse %}
    ...
{% endfor %}

{{ '1234'|reverse }}

{# outputs 4321 #}

For sequences and mappings, numeric keys are not preserved. To reverse
them as well, pass ``true`` as an argument to the ``reverse`` filter:

.. code-block:: twig

    {% for key, value in {1: "a", 2: "b", 3: "c"}|reverse %}
        {{ key }}: {{ value }}
    {%- endfor %}

    {# output: 0: c    1: b    2: a #}

    {% for key, value in {1: "a", 2: "b", 3: "c"}|reverse(true) %}
        {{ key }}: {{ value }}
    {%- endfor %}

    {# output: 3: c    2: b    1: a #}

It also works with objects implementing the `Traversable`_ interface.