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Mendon Kissling 2024-04-19 11:15:14 -04:00
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# Basic prompting
Prompts are the inputs given to a large language model. They are the interface between human instruction and computing tasks.
Prompts serve as the inputs to a large language model (LLM), acting as the interface between human instructions and computational tasks.
By submitting natural language requests to an LLM in a prompt, you can answer questions, generate text, and solve problems.
By submitting natural language requests in a prompt to an LLM, you can obtain answers, generate text, and solve problems.
This article will show you how to use Langflow's prompt tools to submit basic prompts to an LLM, and how different prompting strategies can change your results.
This article demonstrates how to use Langflow's prompt tools to issue basic prompts to an LLM, and how various prompting strategies can affect your outcomes.
## Prerequisites
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│ Collaborate, and contribute at our GitHub Repo 🚀 │
```
Alternatively, visit us on [HuggingFace Spaces](https://docs.langflow.org/getting-started/hugging-face-spaces) or [Lightning.ai Studio](https://lightning.ai/ogabrielluiz-8j6t8/studios/langflow) for a pre-built Langflow test environment.
Alternatively, go to [HuggingFace Spaces](https://docs.langflow.org/getting-started/hugging-face-spaces) or [Lightning.ai Studio](https://lightning.ai/ogabrielluiz-8j6t8/studios/langflow) for a pre-built Langflow test environment.
## Create components
3. Create an [OpenAI API key](https://platform.openai.com).
For this example, you'll build a OpenAI chat flow with four components, and then extend it with prompt templates to see the results.
## Create the basic prompting project
1. From the Langflow dashboard, click **New Project**.
2. Select **Basic Prompting**.
3. The **Basic Prompting** flow is created.
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style={{ width: "80%", margin: "20px auto" }}
/>
1. Create a **ChatOpenAI** component.
2. In the OpenAI API Key field, paste your OpenAI API Key (`sk-...`).
3. Create an **LLMChain** component. Connect the LLM input to the ChatOpenAI LLM's output.
4. Create a **ChatPromptTemplate** component. Connect the output to the LLMChain Prompt's input.
5. Create a **SystemMessagePromptTemplate** component. This represents a system message, which tells the model how to behave. The Prompt field can stay as default. Connect it to the input of **ChatPromptTemplate**.
6. Create a **HumanMessagePromptTemplate** component. This represents a message from the user. In the Prompt field, enter `{text}`. Connect it to the input of **ChatPromptTemplate**.
7. Select the Run icon. LangFlow will check your components for errors and return "Flow is Ready to Run".
8. Select the Messages icon. A chat window will open to run your prompt.
Chat with the bot to see how it responds according to the behavior described in Prompt.
9. Change the behavior in the Prompt field of **SystemMessagePromptTemplate** and see what happens - for example, suggest it be an unhelpful, grumpy assistant, and see how the results change.
This flow allows you to chat with the **OpenAI** component via a **Prompt** component.
Examine the **Prompt** component. The **Template** field instructs the LLM to `Answer the user as if you were a pirate.`
This should be interesting...
## Other prompts
4. To create an environment variable for your OpenAI API key, in the **OpenAI API Key** field, click the **Globe** button, and then click **Add New Variable**.
1. In the **Variable Name** field, enter `openai_api_key`.
2. In the **Value** field, paste your OpenAI API Key (`sk-...`).
3. Click **Save Variable**.
Langflow also has **PromptTemplate** and **ChatMessagePromptTemplate** components.
## Run the basic prompting flow
Connect **PromptTemplate** to the **LLMChain** Prompt output for use as a one-shot prompt.
**ChatMessagePromptTemplate** has a `role` field that can be defined as `system`, `user`, `function`, or `assistant`, replacing the more specific template components you used in the example.
1. Click the **Run** button.
The **Interaction Panel** opens, where you can converse with your bot.
2. Type a message and press Enter.
The bot responds in a markedly piratical manner!
## Modify the prompt for a different result
1. To modify your prompt results, in the **Prompt** template, click the **Template** field.
The **Edit Prompt** window opens.
2. Change `Answer the user as if you were a pirate` to a different character, perhaps `Answer the user as if you were Harold Abelson.`
3. Run the basic prompting flow again.
The response will be markedly different.

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