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layout: stdlib-reference
---

# attribute [vk::binding]

## Description

Declare the Vulkan binding location of a global shader variable.

## Signature

<pre>
[vk::<a href="vk_binding.html#decl-binding" class="code_param">binding</a>(<a href="vk_binding.html#decl-binding" class="code_param">binding</a> : <span class="code_keyword">int</span>, <a href="vk_binding.html#decl-set" class="code_keyword">set</a> : <span class="code_keyword">int</span>)]
</pre>

## Parameters

####  <a id="decl-binding"></a>binding  : int
The binding location.

####  <a id="decl-set"></a>set  : int = 0
The descriptor set index of the binding.