---
layout: stdlib-reference
---

# isDifferentialNull

## Description





## Signature 

<pre>
<span class="code_keyword">bool</span> <a href="isdifferentialnull-2e.html">isDifferentialNull</a>(<a href="../interfaces/idifferentiable-01/index.html" class="code_type">IDifferentiable</a> <a href="isdifferentialnull-2e.html#decl-obj" class="code_param">obj</a>);

</pre>

## Parameters

####  <a id="decl-obj"></a>obj  : [IDifferentiable](../interfaces/idifferentiable-01/index.html)