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45 lines
698 B
Markdown
45 lines
698 B
Markdown
---
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title: len
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description: Returns the length of a string, slice, map, or collection.
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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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keywords: [length]
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signature: ["len INPUT"]
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relatedfuncs: []
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---
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With a string:
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```go-html-template
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{{ "ab" | len }} → 2
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{{ "" | len }} → 0
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```
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With a slice:
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```go-html-template
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{{ slice "a" "b" | len }} → 2
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{{ slice | len }} → 0
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```
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With a map:
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```go-html-template
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{{ dict "a" 1 "b" 2 | len }} → 2
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{{ dict | len }} → 0
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```
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With a collection:
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```go-html-template
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{{ site.RegularPages | len }} → 42
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```
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You may also determine the number of pages in a collection with:
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```go-html-template
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{{ site.RegularPages.Len }} → 42
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```
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