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opentf/website/docs/language/values/index.mdx
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---
page_title: Variables and Outputs
description: >-
An overview of input variables, output values, and local values in Terraform
language.
---
# Variables and Outputs
The Terraform language includes a few kinds of blocks for requesting or
publishing named values.
- [Input Variables](/terraform/language/values/variables) serve as parameters for
a Terraform module, so users can customize behavior without editing the source.
- [Output Values](/terraform/language/values/outputs) are like return values for a
Terraform module.
- [Local Values](/terraform/language/values/locals) are a convenience feature for
assigning a short name to an expression.