44 lines
2.2 KiB
Markdown
44 lines
2.2 KiB
Markdown
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---
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layout: "docs"
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page_title: "Writing and Modifying Code - Terraform CLI"
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---
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# Writing and Modifying Terraform Code
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The [Terraform language](/docs/configuration/index.html) is Terraform's primary
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user interface, and all of Terraform's workflows rely on configurations written
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in the Terraform language.
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Terraform CLI includes several commands to make Terraform code more convenient
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to work with. Integrating these commands into your editing workflow can
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potentially save you time and effort.
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- [The `terraform console` command](/docs/commands/console.html) starts an
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interactive shell for evaluating Terraform
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[expressions](/docs/configuration/expressions.html), which can be a faster way
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to verify that a particular resource argument results in the value you expect.
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- [The `terraform fmt` command](/docs/commands/fmt.html) rewrites Terraform
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configuration files to a canonical format and style, so you don't have to
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waste time making minor adjustments for readability and consistency. It works
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well as a pre-commit hook in your version control system.
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- [The `terraform validate` command](/docs/commands/validate.html) validates the
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syntax and arguments of the Terraform configuration files in a directory,
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including argument and attribute names and types for resources and modules.
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The `plan` and `apply` commands automatically validate a configuration before
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performing any other work, so `validate` isn't a crucial part of the core
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workflow, but it can be very useful as a pre-commit hook or as part of a
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continuous integration pipeline.
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- [The `0.13upgrade` command](/docs/commands/0.13upgrade.html) and
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[the `0.12upgrade` command](/docs/commands/0.12upgrade.html) can automatically
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modify the configuration files in a Terraform module to help deal with major
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syntax changes that occurred in the 0.13 and 0.12 releases of Terraform. Both
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of these commands are only available in the Terraform version they are
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associated with, and you are expected to upgrade older code to be compatible
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with 0.12 before attempting to make it compatible with 0.13. For more detailed
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information about updating code for new Terraform versions, see the [upgrade
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guides](/upgrade-guides/index.html) in the Terraform language docs.
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