Liquid templates: even/odd items in for loop

Question

If I have a for loop in Liquid (using Jekyll), how can I target even (or odd) items only? I have tried:

{% for item in site.posts %}
    {% if forloop.index          


        

Answer 1

In contrast to what the Shopify support thread in Ales Lande's answer says, there is a modulo function in Liquid - in form of the modulo filter.

With it, you can do this:

{% for item in site.posts %}
    {% assign mod = forloop.index | modulo: 2 %}
    {% if mod == 0 %}
        
    {% else %}
        
    {% endif %}
{% endfor %}