terraform language

• terraform - terraform settings and dependent providers
• data - data source, requests terraform read from a given data source
• provider - configs for the specific provider e.g. aws with specified version
• resource - defines components of the infrastructure
• variable - defines variables
• output - use to connect the terraform projects with other poarts of your infrastructure or with other terraform projects
• local - local variables

Difference of resource and data

• data is read only where resource cause terraform to create, update and delete infra objects