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---
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title: seq
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# linktitle:
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description: Creates a sequence of integers.
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date: 2017-02-01
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publishdate: 2017-02-01
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lastmod: 2017-02-01
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description: Returns a slice of integers.
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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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parent: functions
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keywords: []
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signature: ["seq LAST", "seq FIRST LAST", "seq FIRST INCREMENT LAST"]
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workson: []
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hugoversion:
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relatedfuncs: []
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deprecated: false
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draft: false
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aliases: []
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---
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It's named and used in the model of [GNU's seq].
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```
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3 → 1, 2, 3
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1 2 4 → 1, 3
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-3 → -1, -2, -3
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1 4 → 1, 2, 3, 4
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1 -2 → 1, 0, -1, -2
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```go-html-template
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{{ seq 2 }} → [1 2]
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{{ seq 0 2 }} → [0 1 2]
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{{ seq -2 2 }} → [-2 -1 0 1 2]
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{{ seq -2 2 2 }} → [-2 0 2]
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```
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## Example: `seq` with `range` and `after`
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Iterate over a sequence of integers:
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You can use `seq` in combination with `range` and `after`. The following will return 19 elements:
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```
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{{ range after 1 (seq 20)}}
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```go-html-template
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{{ $product := 1 }}
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{{ range seq 4 }}
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{{ $product = mul $product . }}
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{{ end }}
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{{ $product }} → 24
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```
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However, when ranging with an index, the following may be less confusing in that `$indexStartingAt1` and `$num` will return `1,2,3 ... 20`:
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```
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{{ range $index, $num := (seq 20) }}
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$indexStartingAt1 := (add $index 1)
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{{ end }}
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```
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[GNU's seq]: https://www.gnu.org/software/coreutils/manual/html_node/seq-invocation.html#seq-invocation
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