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How-To Guides
=============

A chain is made up of links, which can be either primitives or other chains.
Primitives can be either `prompts <../prompts.html>`_, `llms <../llms.html>`_, `utils <../utils.html>`_, or other chains.
The examples here are all end-to-end chains for specific applications.
They are broken up into three categories:

1. `Generic Chains <./generic_how_to.html>`_: Generic chains, that are meant to help build other chains rather than serve a particular purpose.
2. `Utility Chains <./utility_how_to.html>`_: Chains consisting of an LLMChain interacting with a specific util.
3. `Asynchronous <./async_chain.html>`_: Covering asynchronous functionality.

.. toctree::
   :maxdepth: 1
   :glob:
   :hidden:

   ./generic_how_to.rst
   ./utility_how_to.rst
   ./async_chain.ipynb

In addition to different types of chains, we also have the following how-to guides for working with chains in general:

`Load From Hub <./generic/from_hub.html>`_: This notebook covers how to load chains from `LangChainHub <https://github.com/hwchase17/langchain-hub>`_.