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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<reference xml:id="class.mongodb-bson-decimal128" role="class" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xi="http://www.w3.org/2001/XInclude">
<title>The MongoDB\BSON\Decimal128 class</title>
<titleabbrev>MongoDB\BSON\Decimal128</titleabbrev>
<partintro>
<!-- {{{ MongoDB\BSON\Decimal128 intro -->
<section xml:id="mongodb-bson-decimal128.intro">
&reftitle.intro;
<para>
BSON type for the
<link xlink:href="&url.mongodb.wiki.decimal128;">Decimal128 floating-point format</link>,
which supports numbers with up to 34 decimal digits (i.e. significant
digits) and an exponent range of −6143 to +6144.
</para>
<para>
Unlike the double BSON type (i.e. <type>float</type> in PHP), which only
stores an approximation of the decimal values, the decimal data type stores
the exact value. For example, <literal>MongoDB\BSON\Decimal128('9.99')</literal>
has a precise value of 9.99 where as a double 9.99 would have an approximate
value of 9.9900000000000002131628….
</para>
&mongodb.note.decimal128;
</section>
<!-- }}} -->
<section xml:id="mongodb-bson-decimal128.synopsis">
&reftitle.classsynopsis;
<!-- {{{ Synopsis -->
<classsynopsis>
<ooclass><classname>MongoDB\BSON\Decimal128</classname></ooclass>
<!-- {{{ Class synopsis -->
<classsynopsisinfo>
<modifier>final</modifier>
<ooclass>
<classname>MongoDB\BSON\Decimal128</classname>
</ooclass>
<oointerface>
<interfacename>MongoDB\BSON\Decimal128Interface</interfacename>
</oointerface>
<oointerface>
<interfacename>MongoDB\BSON\Type</interfacename>
</oointerface>
<oointerface>
<interfacename>Serializable</interfacename>
</oointerface>
<oointerface>
<interfacename>JsonSerializable</interfacename>
</oointerface>
<oointerface>
<interfacename>Stringable</interfacename>
</oointerface>
</classsynopsisinfo>
<!-- }}} -->
<classsynopsisinfo role="comment">&Methods;</classsynopsisinfo>
<xi:include xpointer="xmlns(db=http://docbook.org/ns/docbook) xpointer(id('class.mongodb-bson-decimal128')/db:refentry/db:refsect1[@role='description']/descendant::db:methodsynopsis[not(@role='procedural')])" />
</classsynopsis>
<!-- }}} -->
</section>
<section role="changelog">
&reftitle.changelog;
<para>
<informaltable>
<tgroup cols="2">
<thead>
<row>
<entry>&Version;</entry>
<entry>&Description;</entry>
</row>
</thead>
<tbody>
<row>
<entry>PECL mongodb 1.12.0</entry>
<entry>
Implements <interfacename>Stringable</interfacename> for PHP 8.0+.
</entry>
</row>
<row>
<entry>PECL mongodb 1.3.0</entry>
<entry>
Implements <interfacename>MongoDB\BSON\Decimal128Interface</interfacename>.
</entry>
</row>
<row>
<entry>PECL mongodb 1.2.0</entry>
<entry>
Implements <interfacename>Serializable</interfacename> and
<interfacename>JsonSerializable</interfacename>.
</entry>
</row>
</tbody>
</tgroup>
</informaltable>
</para>
</section>
</partintro>
&reference.mongodb.bson.entities.decimal128;
</reference>
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