liquid/_basics/operators.md

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Operators

Liquid includes many logical and comparison operators.

Basic Operators

==	equals
!=	does not equal
>	greater than
<	less than
>=	greater than or equal to
<=	less than or equal to
or	logical or
and	logical and

For example:

{% highlight liquid %}{% raw %} {% if product.title == "Awesome Shoes" %} These shoes are awesome! {% endif %} {% endraw %}{% endhighlight %}

You can use multiple operators in a tag:

{% highlight liquid %}{% raw %} {% if product.type == "Shirt" or product.type == "Shoes" %} This is a shirt or a pair of shoes. {% endif %} {% endraw %}{% endhighlight %}

contains

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

{% highlight liquid %}{% raw %} {% if product.title contains 'Pack' %} This product's title contains the word Pack. {% endif %} {% endraw %}{% endhighlight %}

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

{% highlight liquid %}{% raw %} {% if product.tags contains 'Hello' %} This product has been tagged with 'Hello'. {% endif %} {% endraw %}{% endhighlight %}

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