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Add example demonstrating ROUNDING_MODE with ROUND_DOWN #5235

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Add example demonstrating ROUNDING_MODE with ROUND_DOWN #5235

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39 changes: 39 additions & 0 deletions reference/intl/numberformatter/set-attribute.xml
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Original file line number Diff line number Diff line change
Expand Up @@ -116,6 +116,45 @@ Digits: 2
1.234.567,89
]]>
</screen>
<example>
<title>Using <constant>NumberFormatter::ROUNDING_MODE</constant> to truncate values</title>
<simpara>
By default, <classname>NumberFormatter</classname> rounds values. Using
<constant>NumberFormatter::ROUND_DOWN</constant> as the
<constant>NumberFormatter::ROUNDING_MODE</constant> truncates
the value to the specified number of fraction digits without rounding.
Comment on lines +122 to +125
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@Girgias Girgias Mar 9, 2026

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Are these constants or Enum cases @devnexen ?

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@devnexen devnexen Mar 9, 2026

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constants.

</simpara>
<programlisting role="php">
<![CDATA[
<?php
$fmt = new NumberFormatter('en_US', NumberFormatter::DECIMAL);
$fmt->setAttribute(NumberFormatter::FRACTION_DIGITS, 2);

echo "Default rounding mode:\n";
echo $fmt->format(3.789), "\n"; // 3.79 (rounded up)
echo $fmt->format(3.781), "\n"; // 3.78 (rounded down)

$fmt->setAttribute(NumberFormatter::ROUNDING_MODE, NumberFormatter::ROUND_DOWN);

echo "\nWith ROUND_DOWN (truncate):\n";
echo $fmt->format(3.789), "\n"; // 3.78 (truncated)
echo $fmt->format(3.781), "\n"; // 3.78 (truncated)
?>
]]>
</programlisting>
&example.outputs;
<screen>
<![CDATA[
Default rounding mode:
3.79
3.78

With ROUND_DOWN (truncate):
3.78
3.78
]]>
</screen>
</example>
</refsect1>

<refsect1 role="seealso">
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