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31 lines
1.1 KiB
Markdown
31 lines
1.1 KiB
Markdown
---
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title: "cond"
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date: 2017-09-08
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description: "Return one of two arguments, depending on the value of a third argument."
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categories: [functions]
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menu:
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docs:
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parent: "functions"
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signature: ["cond CONTROL VAR1 VAR2"]
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hugoversion: 0.27
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relatedfuncs: [default]
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toc: false
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draft: false
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---
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`cond` returns *VAR1* if *CONTROL* is true, or *VAR2* if it is not.
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Example:
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```
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{{ cond (eq (len $geese) 1) "goose" "geese" }}
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```
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Would emit "goose" if the `$geese` array has exactly 1 item, or "geese" otherwise.
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{{% warning %}}
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Whenever you use a `cond` function, *both* variable expressions are *always* evaluated. This means that a usage like `cond false (div 1 0) 27` will throw an error because `div 1 0` will be evaluated *even though the condition is false*.
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In other words, the `cond` function does *not* provide [short-circuit evaluation](https://en.wikipedia.org/wiki/Short-circuit_evaluation) and does *not* work like a normal [ternary operator](https://en.wikipedia.org/wiki/%3F:) that will pass over the first expression if the condition returns `false`.
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{{% /warning %}}
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