2022-02-14 03:22:51 +01:00
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---
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title: extern
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layout: command
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2022-03-04 13:10:09 +01:00
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version: 0.59.1
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2022-02-14 03:22:51 +01:00
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---
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Define a signature for an external command
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## Signature
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```> extern (def_name) (params)```
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## Parameters
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- `def_name`: definition name
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- `params`: parameters
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2022-02-25 14:14:15 +01:00
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## Examples
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Write a signature for an external command
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```shell
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> extern echo [text: string]
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```
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