When you start writing Terraform configuration, you will notice very quickly that the language provided by Terraform is very rich and allows for a lot of manipulation.
In the recipes in this chapter, you will learn how to use the Terraform language effectively in order to apply it to real-life business scenarios. We will discuss how to specify the versions of the provider to be used, as well as how to make the code more dynamic with variables and outputs. Then, we will use these concepts to provision several environments with Terraform. After that, we will consider the use of functions and conditions.
We will also learn how to retrieve data from external systems with data blocks, other Terraform state files, ...
