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35 lines
1 KiB
Markdown
35 lines
1 KiB
Markdown
---
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title: math.Counter
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description: Increments and returns a global counter.
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categories: []
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keywords: []
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action:
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aliases: []
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related: []
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returnType: uint64
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signatures: [math.Counter]
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---
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The counter is global for both monolingual and multilingual sites, and its initial value for each build is 1.
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```go-html-template
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{{ warnf "single.html called %d times" math.Counter }}
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```
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```sh
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WARN single.html called 1 times
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WARN single.html called 2 times
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WARN single.html called 3 times
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```
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Use this function to:
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- Create unique warnings as shown above; the [`warnf`] function suppresses duplicate messages
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- Create unique target paths for the `resources.FromString` function where the target path is also the cache key
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[`warnf`]: /functions/fmt/warnf/
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[`resources.FromString`]: /functions/resources/fromstring/
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{{% note %}}
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Due to concurrency, the value returned in a given template for a given page will vary from one build to the next. You cannot use this function to assign a static id to each page.
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{{% /note %}}
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