Types

Liquid objects can return one of six types: String, Number, Boolean, Nil, or Array. Liquid variables can be initialized by using the assign or capture tags.

Strings
Numbers
Booleans
Nil
Arrays

Strings

Strings are declared by wrapping the variable’s value in single or double quotes.

{% assign my_string = "Hello World!" %}

Numbers

Numbers include floats and integers.

{% assign my_num = 25 %}

Booleans

Booleans are either true or false. No quotations are necessary when declaring a boolean

{% assign foo = true %}
{% assign bar = false %}

Nil

Nil is an empty value that is returned when Liquid code has no results. It is not a string with the characters “nil”.

Nil is treated as false in the conditions of {% if %} blocks and other Liquid tags that check for the truthfulness of a statement. The example below shows a situation where a listing does not yet have an email entered. The if statement would not render the included text within it.

{% if listing.email %}
We have an email address!
{% endif %}

Any tags or outputs that return nil will not show anything on the screen.

Input

Tracking number: {{ listing.email.value }}

Output

Tracking number:

Arrays

Arrays hold a list of variables of all types.

Accessing all items in an array

To access items in an array, you can loop through each item in the array using a for tag or a tablerow tag.

Input

<!-- if product.tags = "sale", "summer", "spring", "wholesale" -->
{% for tag in product.tags %}
  {{ tag }}
{% endfor %}

Output

sale summer spring wholesale

Accessing a specific item in an array

You can use square brackets ( [ ] ) notation to access a specific item in an array. Array indexing starts at zero.

Input

<!-- if product.tags = "sale", "summer", "spring", "wholesale" -->
{{ product.tags[0] }}
{{ product.tags[1] }}
{{ product.tags[2] }}
{{ product.tags[3] }}

Output

sale
summer
spring
wholesale

Initializing an array

It is not possible to initialize an array in Liquid. For example, in Javascript you could do something like this:

Output

<script>
var cars = ["Saab", "Volvo", "BMW"];
</script>

In Liquid, you must instead use the split filter to break a single string into an array of substrings. See here for examples.