Prompt Templates and Function Calling

Part of the Prompt Engineering course

In lesson four you formatted a single prompt by hand: delimiters, roles, a few-shot example. That works for one prompt. When you need the same prompt to run over hundreds of different inputs, or you need the model to reach outside its own text and actually do something, you need two new tools. This lesson covers both.

Copying a prompt and editing one word each time is how mistakes creep in. You fix the wording in one copy and forget the other five. The answer is a prompt template: a reusable prompt with named placeholders that you fill from data at the moment you send it.