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layout: stdlib-reference
---

# cudaThreadIdx

## Description





## Signature 

<pre>
<a href="../types/vector/index.html" class="code_type">vector</a>&lt;<span class="code_keyword">uint</span>, 3&gt; <a href="cudathreadidx-4a.html">cudaThreadIdx</a>();

</pre>

## Availability and Requirements

Defined for the following targets:

#### cuda
Available in all stages.