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layout: stdlib-reference
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# concat

## Description

Return a tuple containing the values of both input tuples in order




## Signature 

<pre>
<a href="../types/tuple-0/index.html" class="code_type">Tuple</a>&lt;<a href="concat.html#typeparam-T" class="code_type">T</a>, <a href="concat.html#typeparam-U" class="code_type">U</a>&gt; <a href="concat.html">concat</a>&lt;<span class="code_keyword">each</span> <a href="concat.html#typeparam-T" class="code_type">T</a>, <span class="code_keyword">each</span> <a href="concat.html#typeparam-U" class="code_type">U</a>&gt;(
    <a href="../types/tuple-0/index.html" class="code_type">Tuple</a>&lt;<a href="concat.html#typeparam-T" class="code_type">T</a>&gt; <a href="concat.html#decl-t" class="code_param">t</a>,
    <a href="../types/tuple-0/index.html" class="code_type">Tuple</a>&lt;<a href="concat.html#typeparam-U" class="code_type">U</a>&gt; <a href="concat.html#decl-u" class="code_param">u</a>);

</pre>

## Generic Parameters

####  <a id="typeparam-T"></a>T
####  <a id="typeparam-U"></a>U

## Parameters

####  <a id="decl-t"></a>t  : [Tuple](../types/tuple-0/index.html)\<[T](../types/tuple-0/index.html#typeparam-T)\>
####  <a id="decl-u"></a>u  : [Tuple](../types/tuple-0/index.html)\<U\>