---
layout: docs
title: addParameterf
id: class.Facebook.HackCodegen.CodegenFunctionish.addParameterf
docid: class.Facebook.HackCodegen.CodegenFunctionish.addParameterf
permalink: /docs/reference/class.Facebook.HackCodegen.CodegenFunctionish.addParameterf/
---
# Facebook\\HackCodegen\\CodegenFunctionish::addParameterf()




``` Hack
public function addParameterf(
  HH\Lib\Str\SprintfFormatString $param,
  mixed ...$args,
): this;
```




## Parameters




- ` HH\Lib\Str\SprintfFormatString $param `
- ` mixed ...$args `




## Returns




+ ` this `