33 lines
595 B
Markdown
33 lines
595 B
Markdown
---
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title: Maps
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---
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## Maps
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Maps is the Elixir data structure for key-values.
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They are not ordered and allow keys of any type.
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Maps are created using the %{} syntax:
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```
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iex(1)> %{}
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%{}
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iex(2)> %{1 => "one", 2 => "two", 3 => "three"}
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%{1 => "one", 2 => "two", 3 => "three"}
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```
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Maps can be accessed with `Map.get/3` or `Map.fetch/2` or with through the `map[]` syntax:
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```
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iex(1)> map=%{1 => "one", 2 => "two"}
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%{1 => "one", 2 => "two"}
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iex(2)> Map.fetch(map, 1)
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{:ok, "one"}
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iex(3)> map[2]
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"two"
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iex(4)> map[5]
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nil
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```
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#### More Information:
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[HexDocs](https://hexdocs.pm/elixir/Map.html)
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