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Shopify Liquid Data Types and Variables

In Shopify Liquid, variables and data types are foundational concepts that help you manipulate and display content dynamically.


Shopify Liquid Data Types

Type Description Example

String

A sequence of characters enclosed in quotes.

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

Number

Integer or decimal numbers.

{% assign my_int = 25 %} {% assign my_float = -39.756 %}

Boolean

True or false values.

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

Nil

Represents an empty or undefined value.

{% if user %} Hello {{ user.name }}! {% endif %}

Array

A collection of items that can be looped through.

{% for user in site.users %}{{ user }}{% endfor %} {{ site.users[0] }} {{ site.users[-1] }}


Truthy and Falsy

All data types must return either true or false. Those which return true by default are called truthy. Those that return false by default are called falsy.

Value Truthy Falsy

true

✔

false

✔

nil

✔

empty string

✔

0

✔

integer

✔

float

✔

array

✔

empty array

✔

page

✔

empty object

✔


Liquid Variable tags

Variable tags create new Liquid variables.

Tag Description Example

{% assign %}

Assigns a value to a variable.

{% assign product_name = "Shirt" %}

{% capture %}

Captures a block of content into a variable.

{% capture my_variable %} Hello {% endcapture %}

{% increment %}

Increments a numeric variable.

{% increment page_counter %}

{% decrement %}

Decrements a numeric variable.

{% decrement page_counter %}


Liquid Variable assign

Creates a new named variable.

Code

{% assign my_variable = false %}
{% if my_variable != true %}
  This statement is valid.
{% endif %}

Output

This statement is valid.


Liquid Variable capture

Captures the string inside of the opening and closing tags and assigns it to a variable. Variables created using capture are stored as strings.

Code

{% assign favorite_food = "pizza" %}
{% assign age = 35 %}

{% capture about_me %}
I am {{ age }} and my favorite food is {{ favorite_food }}.
{% endcapture %}

{{ about_me }}

Output

I am 35 and my favourite food is pizza.


Liquid Variable increment

Creates and outputs a new number variable with initial value 0. On subsequent calls, it increases its value by one and outputs the new value.

Code

{% increment my_counter %}
{% increment my_counter %}
{% increment my_counter %}

Output

0
1
2


Liquid Variable decrement

Creates and outputs a new number variable with initial value -1. On subsequent calls, it decreases its value by one and outputs the new value.

Code

{% decrement variable %}
{% decrement variable %}
{% decrement variable %}

Output

-1
-2
-3
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