What should a user do if they want to check what changes will be made by their Terraform code?

To check what changes will be made by their Terraform code, a user should run the command that shows a preview of the actions Terraform will perform without actually applying any changes to the infrastructure. The command "terraform plan" generates an execution plan, which allows users to see the resources that will be created, modified, or destroyed based on the current configurations and the current state of the infrastructure.

This execution plan provides critical insight, making it easier to verify that the intended changes align with the user's expectations prior to any deployment. By using this command, users can identify any potential issues and ensure that their infrastructure will be configured as intended, which is a vital part of the infrastructure as code workflow and helps in maintaining a reliable and consistent environment.

Other commands, such as "terraform apply," execute the changes and do not provide preliminary feedback; "terraform validate" checks the syntax and configuration validity of Terraform files but does not show the changes contextually; and "terraform console" provides an interactive console for evaluating expressions and inspecting the state but does not offer an execution plan for upcoming changes.