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---
title: fmt.Errorf
description: Log an ERROR from a template.
categories: []
keywords: []
action:
aliases: [errorf]
related:
- functions/fmt/Erroridf
- functions/fmt/Warnf
- functions/fmt/Warnidf
returnType: string
signatures: ['fmt.Errorf FORMAT [INPUT]']
aliases: [/functions/errorf]
---
{{% include "functions/fmt/_common/fmt-layout.md" %}}
The `errorf` function evaluates the format string, then prints the result to the ERROR log and fails the build.
```go-html-template
{{ errorf "The %q shortcode requires a src argument. See %s" .Name .Position }}
```
Use the [`erroridf`] function to allow optional suppression of specific errors.
[`erroridf`]: /functions/fmt/erroridf/
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