# Hints

## General

- Use the built-in [(linked) list type][list].

## 1. Define a function to return an empty language list

- You need to define a [named function][named-function] with 0 arguments.

## 2. Define a function to add a language to the list

- You need to define a [named function][named-function] with 2 arguments. The first argument is a [list][list] of language [string-literals][string]. The second argument is a language [string-literal][string].
- You can use list literal notation forms.

## 3. Define a function to remove a language from the list

- You need to define a [named function][named-function] with 1 argument. The first argument is a [list][list] of language [string-literals][string].
- Elixir [provides a function][tl] to return a list with the first item removed.

## 4. Define a function to return the first item in the list

- You need to define a [named function][named-function] with 1 argument. The first argument is a [list][list] of language [string-literals][string].
- Elixir [provides a function][hd] to get the first item from a list.

## 5. Define a function to return how many languages are in the list

- You need to define a [named function][named-function] with 1 argument. The first argument is a [list][list] of language [string-literals][string].
- Elixir [provides a function][length] to count the length of a list.

## 6. Define a function to determine if the list is exciting

- You need to define a [named function][named-function] with 1 argument. The first argument is a [list][list] of language [string-literals][string].
- Your function should return a boolean value indicating whether `"Elixir"` is a member of the list. Elixir [provides a function][in] to test list membership.

[list]: https://elixir-lang.org/getting-started/basic-types.html#linked-lists
[named-function]: https://elixir-lang.org/getting-started/modules-and-functions.html#named-functions
[string]: https://elixir-lang.org/getting-started/basic-types.html#strings
[hd]: https://hexdocs.pm/elixir/Kernel.html#hd/1
[tl]: https://hexdocs.pm/elixir/Kernel.html#tl/1
[length]: https://hexdocs.pm/elixir/Kernel.html#length/1
[in]: https://hexdocs.pm/elixir/Kernel.html#in/2