Functions in Liquid and ConvertKit

{{ variable | function_name: argument1, argument2 }}

{{ "hello world" | capitalize }}
{{ "Hello World" | downcase }}
{{ "hello world" | upcase }}
{{ "hello world" | replace: "hello", "hi" }}
{{ "hello world" | truncate: 5 }}

{% assign tags = subscriber.tags | sort %}
{% assign first_tag = tags | first %}
{% assign last_tag = tags | last %}
{% assign unique_tags = tags | uniq %}

{{ 5 | plus: 3 }}
{{ 10 | minus: 4 }}
{{ 6 | times: 7 }}
{{ 20 | divided_by: 4 }}
{{ 15 | modulo: 4 }}

{{ subscriber.email | encode }}
{{ subscriber.created_at | date: "%B %d, %Y" }}
{{ subscriber.tags | join: ", " }}

{{ form.name | escape }}
{{ form.url | url_encode }}
{{ form.fields | json }}

{{ content | strip_html }}
{{ content | truncatewords: 20 }}
{{ content | markdownify }}

{% include 'format_date' with date: subscriber.created_at %}

{{ subscriber.first_name | capitalize | truncate: 10 }}
{{ subscriber.tags | sort | join: ", " }}

{% if subscriber.tags.size > 5 %}
  {{ subscriber.tags | slice: 0, 5 | join: ", " }} and more...
{% else %}
  {{ subscriber.tags | join: ", " }}
{% endif %}

{{ subscriber.custom_fields.birthday | date: "%B %d" | default: "Not specified" }}

{% assign full_name = subscriber.first_name | append: " " | append: subscriber.last_name | default: "valued subscriber" %}
Dear {{ full_name }},
 
Your subscription started on {{ subscriber.created_at | date: "%B %d, %Y" }}.

{% assign interests = form.interests | split: "," | sort | uniq %}
You selected {{ interests.size }} interests:
{{ interests | join: ", " }}

{% assign excerpt = post.content | strip_html | truncatewords: 50 %}
{{ excerpt | markdownify }}