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doc: number_format add math calculation hint #3170

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Oct 17, 2019
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doc: number_format add math calculation hint #3170

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4 changes: 3 additions & 1 deletion doc/filters/number_format.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -15,13 +15,15 @@ separator using the additional arguments:

{{ 9800.333|number_format(2, '.', ',') }}

To format negative numbers, wrap the number with parentheses (needed because of
To format negative numbers or math calculation, wrap the previous statement with parentheses (needed because of
Twig's :ref:`precedence of operators <twig-expressions>`:

.. code-block:: twig

{{ -9800.333|number_format(2, '.', ',') }} {# outputs : -9 #}
{{ (-9800.333)|number_format(2, '.', ',') }} {# outputs : -9,800.33 #}
{{ 1 + 0.2 | number_format(2) }} {# outputs : 1.2 #}
{{ (1 + 0.2) | number_format(2) }} {# outputs : 1.20 #}

If no formatting options are provided then Twig will use the default formatting
options of:
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