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+
+<refentry id="qnan">
+<indexterm id="IndexQnan"><primary>qnan</primary></indexterm>
+  <refentryinfo><title>Mathematical Operations:Mathematical Functions</title></refentryinfo>
+  <refmeta>
+    <refentrytitle>qnan</refentrytitle>
+  </refmeta>
+
+
+ 
+  <refnamediv>
+    <refname>qnan</refname>
+
+    <refpurpose>
+      Questions whether the argument is a infinite number
+    </refpurpose>
+  </refnamediv>
+
+  <refsect1>
+    <title>Description</title>
+    <para>
+      Returns the number of times the argument is not a number.
+    </para>
+  </refsect1>
+ 
+  <refsect1>
+    <title>Syntax</title>
+    <synopsis><command>qnan</command>(x) (no rate restriction)</synopsis>
+  </refsect1>
+
+  <refsect1>
+    <title>Examples</title>
+    <para>
+      Here is an example of the qnan opcode. It uses the file <ulink url="examples/qnan.csd"><citetitle>qnan.csd</citetitle></ulink>.
+
+      <example>
+        <title>Example of the qnan opcode.</title>
+
+        
+
+        <para>See the sections <link linkend="UsingRealTime"><citetitle>Real-time Audio</citetitle></link> and <link linkend="CommandFlags"><citetitle>Command Line Flags</citetitle></link> for more information on using command line flags.</para>
+          <xi:include href="examples-xml/qnan.csd.xml" xmlns:xi="http://www.w3.org/2001/XInclude"/>
+      </example>
+
+    </para>
+  </refsect1>
+
+  <refsect1>
+    <title>Credits</title>
+    <para>Written by &namejohn;.</para>
+    <para>New in Csound 5.14</para>
+  </refsect1>
+</refentry>