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<center><b><big><big>Convert an AD Variable to a Parameter</big></big></b></center>
<br/>
<b><big><a name="Syntax" id="Syntax">Syntax</a></big></b>

<br/>

<code><i><font color="black"><span style='white-space: nowrap'>y</span></font></i><font color="blue"><span style='white-space: nowrap'>&#xA0;=&#xA0;Var2Par(</span></font><i><font color="black"><span style='white-space: nowrap'>x</span></font></i><font color="blue"><span style='white-space: nowrap'>)</span></font></code>



<br/>
<br/>
<b><big><a name="Purpose" id="Purpose">Purpose</a></big></b>
<br/>
Returns a 
<a href="glossary.xml#Parameter" target="_top"><span style='white-space: nowrap'>parameter</span></a>
 
<code><i><font color="black"><span style='white-space: nowrap'>y</span></font></i></code>

with the same value as the 
<a href="glossary.xml#Variable" target="_top"><span style='white-space: nowrap'>variable</span></a>
 
<code><i><font color="black"><span style='white-space: nowrap'>x</span></font></i></code>
.

<br/>
<br/>
<b><big><a name="x" id="x">x</a></big></b>
<br/>
The argument 
<code><i><font color="black"><span style='white-space: nowrap'>x</span></font></i></code>
 has prototype

<code><font color="blue"><span style='white-space: nowrap'><br/>
&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;const&#xA0;AD&lt;</span></font><i><font color="black"><span style='white-space: nowrap'>Base</span></font></i><font color="blue"><span style='white-space: nowrap'>&gt;&#xA0;&amp;x<br/>
</span></font></code>
The argument 
<code><i><font color="black"><span style='white-space: nowrap'>x</span></font></i></code>
 may be a variable or parameter.


<br/>
<br/>
<b><big><a name="y" id="y">y</a></big></b>
<br/>
The result 
<code><i><font color="black"><span style='white-space: nowrap'>y</span></font></i></code>
 has prototype

<code><font color="blue"><span style='white-space: nowrap'><br/>
&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;AD&lt;</span></font><i><font color="black"><span style='white-space: nowrap'>Base</span></font></i><font color="blue"><span style='white-space: nowrap'>&gt;&#xA0;&amp;y<br/>
</span></font></code>
The return value 
<code><i><font color="black"><span style='white-space: nowrap'>y</span></font></i></code>
 will be a parameter. 


<br/>
<br/>
<b><big><a name="Example" id="Example">Example</a></big></b>

<br/>
The file
<a href="var2par.cpp.xml" target="_top"><span style='white-space: nowrap'>var2par.cpp</span></a>

contains an example and test of this operation.
It returns true if it succeeds and false otherwise.


<hr/>Input File: cppad/local/var2par.hpp

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