How to get the length of a list in Elixir

Overview

In this shot, we will learn how to use the length() function to calculate the length of a list in Elixir.

A list is a heterogeneous collection of items in Elixir.

• A list is specified between square brackets [] and separated with a comma ,.
• Under the hood, lists in elixir are linked lists.

Syntax

length(list)

Parameters

This method accepts a list as a parameter.

Return value

The length() function returns the length of the list that is passed as a parameter.

Example

In the example below, we will calculate the length of the list of numbers.

Code

Explanation

In the code above:

• Line 2: We declare and initialize the list n with some numbers.
• Line 5: We use the length() function to calculate the length of the list n and assign the returned length to variable l.
• Line 8: We use IO.puts to print the length of the variable l.