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Liquid Datatypes

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Liquid objects can produce one of six types: String, Number, Boolean, Nil, Array, or EmptyDrop. Liquid variables are set up using the assign or capture tags.

Strings

Strings in programming are marked by enclosing the value of a variable inside either single (' ') or double (" ") quotes.

{%- assign my_string = 'Hello World!' -%}
{{ my_string }}

Numbers

Numbers include floats and integers.

{%- assign my_num = 25 -%}
{{ my_num }}

Booleans

Booleans represent values that can be either true or false. When declaring a boolean variable, you do not use quotation marks.

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

Nil

Nil represents an absence of value returned by Liquid code when there are no results. It's distinct from a string containing the characters 'nil'. In {% if %} blocks and similar Liquid tags, Nil behaves like false when evaluating conditions.

Note: A string containing the characters "nil" is different from the value nil.

Arrays

Arrays contain a collection of variables of various types. To retrieve elements from an array, you can iterate through each item using a for tag or a tablerow tag.

{%- for tag in product.tags -%}
{{ tag }}
{%- endfor -%}

EmptyDrop

An EmptyDrop object is returned when attempting to access an object that does not exist. This could happen if a collection, page, or blog has been deleted or hidden.

{%- unless pages.about-us == empty -%}
<h1>{{ page.title }} </h1>
<div>
{{ page.content }}
</div>
{%- endunless -%}
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