# C1.CalcEngine.ExpressionEngine.FunctionDefinition.-ctor

## Content

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<h1 id="C1_CalcEngine_ExpressionEngine_FunctionDefinition__ctor_" data-uid="C1.CalcEngine.ExpressionEngine.FunctionDefinition.#ctor*">FunctionDefinition Constructor
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<div class="markdown level0 conceptual"></div>



<a id="C1_CalcEngine_ExpressionEngine_FunctionDefinition__ctor_" data-uid="C1.CalcEngine.ExpressionEngine.FunctionDefinition.#ctor*"></a>
<h4 id="C1_CalcEngine_ExpressionEngine_FunctionDefinition__ctor_System_Int32_System_Int32_System_Func_System_Collections_Generic_List_C1_CalcEngine_ExpressionEngine_IExpression__System_Object__C1_CalcEngine_ItemType_" data-uid="C1.CalcEngine.ExpressionEngine.FunctionDefinition.#ctor(System.Int32,System.Int32,System.Func{System.Collections.Generic.List{C1.CalcEngine.ExpressionEngine.IExpression},System.Object},C1.CalcEngine.ItemType)">FunctionDefinition(int, int, Func&lt;List&lt;IExpression&gt;, object&gt;, ItemType)</h4>
<div class="markdown level1 summary"><p>Initializes a new instance of the <a class="xref" href="C1.CalcEngine.ExpressionEngine.FunctionDefinition.html">FunctionDefinition</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 FunctionDefinition(int minArgsCount, int maxArgsCount, Func&lt;List&lt;IExpression&gt;, object&gt; function, ItemType functionType)</code></pre>
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  <pre><code class="lang-vbnet hljs">Public Sub New(minArgsCount As Integer, maxArgsCount As Integer, [function] As Func(Of List(Of IExpression), Object), functionType As ItemType)</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>
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    <tr>
      <td><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.int32">int</a></td>
      <td><span class="parametername">minArgsCount</span></td>
      <td><p>Minimum count of function arguments.</p>
</td>
    </tr>
    <tr>
      <td><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.int32">int</a></td>
      <td><span class="parametername">maxArgsCount</span></td>
      <td><p>Maximum count of function arguments.</p>
</td>
    </tr>
    <tr>
      <td><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.func-2">Func</a>&lt;<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;, <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.object">object</a>&gt;</td>
      <td><span class="parametername">function</span></td>
      <td><p>Function for this definition.</p>
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    </tr>
    <tr>
      <td><a class="xref" href="C1.CalcEngine.ItemType.html">ItemType</a></td>
      <td><span class="parametername">functionType</span></td>
      <td><p>Function type.</p>
</td>
    </tr>
  </tbody>
</table>
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