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Liquid has access to many logical and comparison operators. You can use operators to create logic with control flow tags.

Basic operators

Operator Function
== equals
!= does not equal
> Shorts Classics Classics Classics Shorts Classics Shorts greater than
< less than
>= greater than or equal to
<= Classics Shorts Classics Shorts Classics Shorts Classics less than or equal to
Classics Shorts Shorts Classics Classics Classics Shorts or condition A or condition B
and condition A and condition B

For example:

{% if customer.has_account ==Classics Classics Shorts Shorts Shorts Classics Classics true %}
  Welcome back to our store!
{% endif %}

You can do multiple comparisons in a tag using the andLike Short It Shirt I Sleeve 7aqTOcF and or operators:

{% if product.type == "Shirt" or product.type == "Shoes" %}
  This is a shirt or a shoe.
{% endif %}

contains

contains checks for the presence of a substring in a string.

Classics Classics Classics Classics Shorts Shorts Shorts {% if customer.email contains "shopify.com" %}
  Hey there, Shopify employee!
{% endif %}

contains can also check for the presence of a string in an array of strings.

Classics Shorts Shorts Classics Classics Classics Shorts {% if product.tags contains "outdoor" %}
  This product is great for using outdoors!
{% endif %}

contains can only search strings. You cannot use it to check for an object in an array of objects.

Classics Shorts Shorts Classics Classics Shorts Classics Order of operations

In tags with more than one and or or operator, operators are checked in order from right to left. You cannot change the order of operations using parentheses — parentheses are invalid characters in Liquid and will prevent your tags from working.

{% if true or false Classics Shorts Shorts Classics Shorts Classics Classics and false %}
  This evaluates to true, since the 'and' condition is checked first.
{% endif %}
{% if true andClassics Shorts Shorts Classics Shorts Classics Classics false and false or true %}
  This evaluates to false, since the tags are checked like this:

  true and (false and (false or true))
  true and (false and true)
  true and false
  false
{% endif %}

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