size

Returns the number of characters in a string or the number of items in an array.

输入

{{ "Ground control to Major Tom." | size }}

输出

28

输入

{% assign my_array = "apples, oranges, peaches, plums" | split: ", " %}

{{ my_array.size }}

输出

4

You can use size with dot notation when you need to use the filter inside a tag:

{% if site.pages.size > 10 %}
  This is a big website!
{% endif %}