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``length``
==========
The ``length`` filter returns the number of items of a sequence or mapping, or
the length of a string.
For objects that implement the ``Countable`` interface, ``length`` will use the
return value of the ``count()`` method.
For objects that implement the ``__toString()`` magic method (and not ``Countable``),
it will return the length of the string provided by that method.
For objects that implement the ``Traversable`` interface, ``length`` will use the return value of the ``iterator_count()`` method.
.. code-block:: twig
{% if users|length > 10 %}
...
{% endif %}
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