In

The in operator is used to check if a value is present in a list, string, or other collection type. It returns true if the value on the left side of the operator is found within the collection on the right side, and false otherwise.

Example of how to use the in operator combined with if/else to verify if an item is present in a given list:

{% set fruits = ['Apple', 'Banana', 'Orange'] %}

{# Checking if 'Apple' is in the fruits list #}
{% if 'Apple' in fruits %}
Apple is in the fruits list.
{% else %}
Apple is not in the fruits list.
{% endif %}

In this example, the in operator checks if the string “Apple” is present in the list fruits. Since “Apple” is in the list, the condition evaluates to true, and the message “Apple is in the fruits list.” will be displayed.