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``` git subtree add --prefix=docs/ https://github.com/gohugoio/hugoDocs.git master --squash ``` Closes #11925
47 lines
1.1 KiB
Markdown
47 lines
1.1 KiB
Markdown
---
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title: math.Rand
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description: Returns a pseudo-random number in the half-open interval [0.0, 1.0).
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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: float64
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signatures: [math.Rand]
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---
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{{< new-in 0.121.2 >}}
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The `math.Rand` function returns a pseudo-random number in the [half-open interval] [0.0, 1.0).
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```go-html-template
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{{ math.Rand }} → 0.6312770459590062
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```
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To generate a random integer in the [closed interval] [0, 5]:
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```go-html-template
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{{ math.Rand | mul 6 | math.Floor }}
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```
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To generate a random integer in the closed interval [1, 6]:
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```go-html-template
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{{ math.Rand | mul 6 | math.Ceil }}
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```
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To generate a random float, with one digit after the decimal point, in the closed interval [0, 4.9]:
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```go-html-template
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{{ div (math.Rand | mul 50 | math.Floor) 10 }}
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```
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To generate a random float, with one digit after the decimal point, in the closed interval [0.1, 5.0]:
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```go-html-template
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{{ div (math.Rand | mul 50 | math.Ceil) 10 }}
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```
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[closed interval]: /getting-started/glossary/#interval
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[half-open interval]: /getting-started/glossary/#interval
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