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---
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layout: "language"
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page_title: "Variables and Outputs"
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---
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# Variables and Outputs
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The Terraform language includes a few kinds of blocks for requesting or
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publishing named values.
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- [Input Variables](/docs/language/values/variables.html) serve as parameters for
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a Terraform module, so users can customize behavior without editing the source.
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- [Output Values](/docs/language/values/outputs.html) are like return values for a
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Terraform module.
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- [Local Values](/docs/language/values/locals.html) are a convenience feature for
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assigning a short name to an expression.
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