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website/content/docs/templates/hcl_templates/functions/conversion/can.mdx vendored
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---
page_title: can function reference
description: |-
The `can` function evaluates an expression as an argument and
indicates whether the evaluation succeeded. Learn how to us the `can` function in Packer templates.
The `can` function evaluates an expression and indicates whether it succeeds.
---
# `can` Function

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---
page_title: convert function reference
description: The `convert` function converts a value or an expression to a given type. Learn how to use the `convert` function in Packer templates.
description: The `convert` function converts a value or an expression to a given type.
---
# `convert` Function

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website/content/docs/templates/hcl_templates/functions/conversion/try.mdx vendored
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---
page_title: try function reference
description: |-
The `try` function evaluate a sequence of expressions and returns the result of the first expression that does not produce any errors. Learn how to use the `try` function in Packer templates.
The `try` function evaluates a sequence of expressions and returns the result of the first expression that does not produce any errors.
---
# `try` Function

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website/content/docs/templates/hcl_templates/functions/encoding/base64encode.mdx vendored
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---
page_title: base64encode function reference
description: The `base64encode` function applies base64 encoding to a string. Learn how to use the `base64encode` function in Packer templates.
description: The `base64encode` function encodes a string in base64 format.
---
# `base64encode` Function

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website/content/docs/templates/hcl_templates/functions/encoding/base64gzip.mdx vendored
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---
page_title: base64gzip function reference
description: The `base64gzip` function compresses the given string using gzip and then encodes the result in base64. Learn how to use the `base64gzip` in Packer templates.
description: The `base64gzip` function compresses the given string using gzip and then encodes the result in base64.
---
# `base64gzip` Function

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website/content/docs/templates/hcl_templates/functions/encoding/csvdecode.mdx vendored
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---
page_title: csvdecode function reference
description: The `csvdecode` function decodes CSV data into a list of maps. Learn how to use the `csvdecode` function in Packer templates.
description: The `csvdecode` function decodes CSV data into a list of maps.
---
# `csvdecode` Function

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website/content/docs/templates/hcl_templates/functions/encoding/jsondecode.mdx vendored
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---
page_title: jsondecode function reference
description: |-
The `jsondecode` function decodes a JSON string into a representation of its
value. Learn how to use the `jsondecode` function in Packer templates.
The `jsondecode` function decodes a JSON string into its corresponding Packer value.
---
# `jsondecode` Function

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website/content/docs/templates/hcl_templates/functions/encoding/jsonencode.mdx vendored
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---
page_title: jsonencode function reference
description: The `jsonencode` function encodes a given value as a JSON string. Learn how to use the `jsonencode` function in Packer templates.
description: The `jsonencode` function encodes a given value as a JSON string.
---
# `jsonencode` Function

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website/content/docs/templates/hcl_templates/functions/encoding/textdecodebase64.mdx vendored
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---
page_title: testdecodebase64 function reference
description: The `testdecodebase64` function converts a base64-encoded string into a UTF-8 string. Learn how to use the `testdecodebase64` function in Packer templates.
description: The `testdecodebase64` function converts a base64-encoded string into a UTF-8 string.
---
# `textdecodebase64` Function

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website/content/docs/templates/hcl_templates/functions/encoding/textencodebase64.mdx vendored
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---
page_title: testencodebase64 function reference
description: The `testencodebase64` function converts a UTF-8 NFC string into a base64 blob to match the destination encoding. Learn how to use the `testencodebase64` function in Packer templates.
description: The `testencodebase64` function converts a UTF-8 NFC string into a base64 blob to match the destination encoding.
---
# `textencodebase64` Function

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website/content/docs/templates/hcl_templates/functions/encoding/urlencode.mdx vendored
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---
page_title: urlencode function reference
description: The `urlencode` function applies URL encoding to a given string. Learn how to use the `urlencode` function in Packer templates.
description: The `urlencode` function applies URL encoding to a given string.
---
# `urlencode` Function

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website/content/docs/templates/hcl_templates/functions/encoding/yamldecode.mdx vendored
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---
page_title: yamldecode function reference
description: |-
The `yamldecode` function decodes a YAML string into a representation of its
value. Learn how to use the `yamldecode` function in Packer templates.
The `yamldecode` function decodes a YAML string into its corresponding Packer value.
---
# `yamldecode` Function

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website/content/docs/templates/hcl_templates/functions/encoding/yamlencode.mdx vendored
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---
page_title: yamlencode function reference
description: The `yamlencode` function encodes a given value as a YAML string. Learn how to use the `yamlencode` function in Packer templates.
description: The `yamlencode` function encodes a given value as a YAML string.
---
# `yamlencode` Function

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website/content/docs/templates/hcl_templates/functions/index.mdx vendored
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# Built-in functions overview
This topic provides an overview of the built-in HashiCorp configuration language (HCL) functions you can use to create Packer templates.
This topic provides an overview of the built-in HashiCorp configuration language (HCL) functions you can use in your Packer templates.
## Functions syntax
You can use functions in Packer templates to transform and combine values. The general
You can use functions in Packer templates to transform and combine values. The
syntax for function calls is a function name followed by comma-separated
arguments in parentheses: