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layout: stdlib-reference
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# IArithmetic\.neg

## Description

Negates a value of the conforming type.



## Signature 

<pre>
<a href="index.html" class="code_type">IArithmetic</a>.<span class="code_keyword">This</span> <a href="index.html" class="code_type">IArithmetic</a>.<a href="neg.html">neg</a>();

</pre>

## Return value
The negation of <span class='code'>this</span>.