# C1.CalcEngine.ExpressionEngine.FunctionExpression.-ctor

## Content

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<h1 id="C1_CalcEngine_ExpressionEngine_FunctionExpression__ctor_" data-uid="C1.CalcEngine.ExpressionEngine.FunctionExpression.#ctor*">FunctionExpression Constructor
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<div class="markdown level0 conceptual"></div>



<a id="C1_CalcEngine_ExpressionEngine_FunctionExpression__ctor_" data-uid="C1.CalcEngine.ExpressionEngine.FunctionExpression.#ctor*"></a>
<h4 id="C1_CalcEngine_ExpressionEngine_FunctionExpression__ctor_C1_CalcEngine_ExpressionEngine_IExpressionEngine_System_String_C1_CalcEngine_ExpressionEngine_FunctionDefinition_System_Collections_Generic_List_C1_CalcEngine_ExpressionEngine_IExpression__" data-uid="C1.CalcEngine.ExpressionEngine.FunctionExpression.#ctor(C1.CalcEngine.ExpressionEngine.IExpressionEngine,System.String,C1.CalcEngine.ExpressionEngine.FunctionDefinition,System.Collections.Generic.List{C1.CalcEngine.ExpressionEngine.IExpression})">FunctionExpression(IExpressionEngine, string, FunctionDefinition, List&lt;IExpression&gt;)</h4>
<div class="markdown level1 summary"><p>Initializes a new instance of the <a class="xref" href="C1.CalcEngine.ExpressionEngine.FunctionExpression.html">FunctionExpression</a> class.</p>
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<div class="markdown level1 conceptual"></div>
<h5 class="declaration">Declaration</h5>
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  <pre><code class="lang-csharp hljs">public FunctionExpression(IExpressionEngine engine, string id, FunctionDefinition function, List&lt;IExpression&gt; args)</code></pre>
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  <pre><code class="lang-vbnet hljs">Public Sub New(engine As IExpressionEngine, id As String, [function] As FunctionDefinition, args As List(Of IExpression))</code></pre>
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<h5 class="parameters">Parameters</h5>
<table class="table table-bordered table-condensed">
  <thead>
    <tr>
      <th>Type</th>
      <th>Name</th>
      <th>Description</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td><a class="xref" href="C1.CalcEngine.ExpressionEngine.IExpressionEngine.html">IExpressionEngine</a></td>
      <td><span class="parametername">engine</span></td>
      <td><p>the engine that initializes this expression.</p>
</td>
    </tr>
    <tr>
      <td><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.string">string</a></td>
      <td><span class="parametername">id</span></td>
      <td><p>the function identifier.</p>
</td>
    </tr>
    <tr>
      <td><a class="xref" href="C1.CalcEngine.ExpressionEngine.FunctionDefinition.html">FunctionDefinition</a></td>
      <td><span class="parametername">function</span></td>
      <td><p>the function.</p>
</td>
    </tr>
    <tr>
      <td><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.collections.generic.list-1">List</a>&lt;<a class="xref" href="C1.CalcEngine.ExpressionEngine.IExpression.html">IExpression</a>&gt;</td>
      <td><span class="parametername">args</span></td>
      <td><p>the argumetns of the function.</p>
</td>
    </tr>
  </tbody>
</table>
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