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+``abs``
+=======
+
+The ``abs`` filter returns the absolute value.
+
+.. code-block:: jinja
+
+    {# number = -5 #}
+    
+    {{ number|abs }}
+    
+    {# outputs 5 #}
+
+.. note::
+
+    Internally, Twig uses the PHP `abs`_ function.
+
+.. _`abs`: http://php.net/abs