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    <title>MongoDB Jira</title>
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    <description>This file is an XML representation of an issue</description>
    <language>en-us</language>    <build-info>
        <version>9.7.1</version>
        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[DOCS-4657] $mul example seems to advocate using floating point for currency</title>
                <link>https://jira.mongodb.org/browse/DOCS-4657</link>
                <project id="10380" key="DOCS">Documentation</project>
                    <description>&lt;p&gt;See &lt;a href=&quot;http://docs.mongodb.org/manual/reference/operator/update/mul/#multiply-the-value-of-a-field&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://docs.mongodb.org/manual/reference/operator/update/mul/#multiply-the-value-of-a-field&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;The example uses a document with the structure:&lt;/p&gt;

&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
&lt;table cellspacing=&quot;0&quot; cellpadding=&quot;0&quot; border=&quot;0&quot; width=&quot;100%&quot; style=&quot;font-size: 1em; line-height: 1.4em !important; font-weight: normal; font-style: normal; color: black;&quot;&gt;
		&lt;tbody &gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;{ _id: 1, item: &quot;ABC&quot;, price: 10.99 }&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;

&lt;p&gt;While the result of the &lt;tt&gt;$mul&lt;/tt&gt; operator results in an obviously incorrect price value, we don&apos;t explain why it might not be a good idea to use floating point as a representation of &lt;tt&gt;price&lt;/tt&gt;. Perhaps the message is too subtle?&lt;/p&gt;

&lt;p&gt;See &lt;a href=&quot;http://stackoverflow.com/questions/3730019/why-not-use-double-or-float-to-represent-currency&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://stackoverflow.com/questions/3730019/why-not-use-double-or-float-to-represent-currency&lt;/a&gt;&lt;/p&gt;</description>
                <environment></environment>
        <key id="178523">DOCS-4657</key>
            <summary>$mul example seems to advocate using floating point for currency</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</type>
                                            <priority id="3" iconUrl="https://jira.mongodb.org/images/icons/priorities/major.svg">Major - P3</priority>
                        <status id="6" iconUrl="https://jira.mongodb.org/images/icons/statuses/closed.png" description="The issue is considered finished, the resolution is correct. Issues which are closed can be reopened.">Closed</status>
                    <statusCategory id="3" key="done" colorName="success"/>
                                    <resolution id="9">Done</resolution>
                                        <assignee username="kay.kim@mongodb.com">Kay Kim</assignee>
                                    <reporter username="graham.lowe@mongodb.com">Graham Lowe</reporter>
                        <labels>
                    </labels>
                <created>Tue, 13 Jan 2015 20:38:38 +0000</created>
                <updated>Mon, 30 Oct 2023 21:50:00 +0000</updated>
                            <resolved>Fri, 16 Mar 2018 19:21:15 +0000</resolved>
                                                    <fixVersion>Server_Docs_20231030</fixVersion>
                                    <component>manual</component>
                        <due></due>
                            <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="1837091" author="kay.kim@10gen.com" created="Fri, 16 Mar 2018 19:21:15 +0000"  >&lt;p&gt;&lt;a href=&quot;https://github.com/mongodb/docs/commit/9e3d21ca9a42afad8855fbe4e6e180b186b5c806&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/9e3d21ca9a42afad8855fbe4e6e180b186b5c806&lt;/a&gt;&lt;/p&gt;</comment>
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