Can you explain the concept of Infrastructure as Code (IaC)? Provide an example.

Infrastructure as Code (IaC) is the practice of managing and provisioning infrastructure using code and automation scripts. Instead of manually configuring servers, networks, and resources, IaC tools like Terraform or CloudFormation allow us to define infrastructure in code, making it versionable, repeatable, and scalable. For example, in Terraform, you can write code to describe the resources needed for a web application, and the tool will create and manage those resources based on the code.