Iteration tags

Iteration tags repeatedly run blocks of code.

for

Repeatedly executes a block of code. For a full list of attributes available within a for loop, see forloop (object).

for loops can output a maximum of 50 results per page. In cases where there are more than 50 results, use the paginate tag to split them across multiple pages.

{% for product in collection.products %}
  {{ product.title }}
{% endfor %}
Fancy hat Snazzy shirt Dapper pants

else

Specifies a fallback case for a for loop which will run if the loop has zero length (for example, you loop over a collection that has no products):

{% for product in collection.products %}
  {{ product.title }}
{% else %}
  The collection is empty.
{% endfor %}
The collection is empty.

break

Causes the loop to stop iterating when it encounters the break tag.

{% for i in (1..5) %}
  {% if i == 4 %}
    {% break %}
  {% else %}
    {{ i }}
  {% endif %}
{% endfor %}
1 2 3

continue

Causes the loop to skip the current iteration when it encounters the continue tag.

{% for i in (1..5) %}
  {% if i == 4 %}
    {% continue %}
  {% else %}
    {{ i }}
  {% endif %}
{% endfor %}
1 2 3   5

for tag parameters

limit

Exits the for loop at a specific index.

<!-- numbers = [1,2,3,4,5] -->

  {% for item in numbers limit:2 %}
    {{ item }}
  {% endfor %}
1 2

offset

Starts the for loop at a specific index.

<!-- numbers = [1,2,3,4,5] -->
  {% for item in numbers offset:2 %}
    {{ item }}
  {% endfor %}
3 4 5

range

Defines a range of numbers to loop through. You can define the range using both literal and variable values.

{% for i in (3..5) %}
  {{ i }}
{% endfor %}

{% assign my_limit = 4 %}
{% for i in (1..my_limit) %}
{{ i }}
{% endfor %}
3 4 5

1 2 3 4

reversed

Reverses the order of the loop.

<!-- if array = [1,2,3,4,5,6] -->
{% for item in array reversed %}
  {{ item }}
{% endfor %}
6 5 4 3 2 1

cycle

Loops through a group of strings and outputs them in the order that they were passed as parameters. Each time cycle is called, the next string that was passed as a parameter is output.

cycle must be used within a for loop block.

{% cycle 'one', 'two', 'three' %}
{% cycle 'one', 'two', 'three' %}
{% cycle 'one', 'two', 'three' %}
{% cycle 'one', 'two', 'three' %}
one
two
three
one

Uses for cycle include:

  • applying odd/even classes to rows in a table
  • applying a unique class to the last product thumbnail in a row

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