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layout: stdlib-reference
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# IDifferentiable\.dadd

## Description

Adds two differential values and returns the result.




## Signature 

<pre>
<span class='code_keyword'>static</span> <a href="index.html" class="code_type">IDifferentiable</a>.<span class="code_keyword">This</span>.Differential <a href="index.html" class="code_type">IDifferentiable</a>.<a href="dadd.html">dadd</a>(
    <a href="index.html" class="code_type">IDifferentiable</a>.<span class="code_keyword">This</span>.Differential <a href="dadd.html#decl-SLANG_anonymous_0" class="code_param">SLANG_anonymous_0</a>,
    <a href="index.html" class="code_type">IDifferentiable</a>.<span class="code_keyword">This</span>.Differential <a href="dadd.html#decl-SLANG_anonymous_1" class="code_param">SLANG_anonymous_1</a>);

</pre>

## Parameters

####  <a id="decl-SLANG_anonymous_0"></a>SLANG\_anonymous\_0  : [IDifferentiable](index.html)\.This\.Differential
####  <a id="decl-SLANG_anonymous_1"></a>SLANG\_anonymous\_1  : [IDifferentiable](index.html)\.This\.Differential
Adds two differential values and returns the result.