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36 lines
639 B
Markdown
36 lines
639 B
Markdown
---
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title: if
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layout: command
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version: 0.59.0
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---
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Conditionally run a block.
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## Signature
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```> if (cond) (then_block) (else_expression)```
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## Parameters
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- `cond`: condition to check
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- `then_block`: block to run if check succeeds
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- `else_expression`: expression or block to run if check fails
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## Examples
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Output a value if a condition matches, otherwise return nothing
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```shell
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> if 2 < 3 { 'yes!' }
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```
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Output a value if a condition matches, else return another value
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```shell
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> if 5 < 3 { 'yes!' } else { 'no!' }
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```
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Chain multiple if's together
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```shell
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> if 5 < 3 { 'yes!' } else if 4 < 5 { 'no!' } else { 'okay!' }
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```
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