Well, there you have it. In this chapter, you learned about the fundamentals of how a Lambda function works in AWS. We covered quite a lot of thing: the permissions model, the three types of invocation, event source options, the code structure of a function, and what is available during execution. We also learned how to write, build, and deploy a function and, hopefully, you were successful in invoking your first Lambda function.

If you're developing and deploying solutions to AWS, it's really important that you learn how Lambda functions work and how to write your own. They will undoubtedly be a useful component in building future solutions.

In later chapters, we're going to explore a development life cycle for Lambda functions and explore some more advanced concepts. In the next chapter, we'll add another component that complements our Lambda compute capability.