Twig模板的Not子句

Question

How do I do a NOT clause in a Twig template similar to PHP's !? Given sick values of either true or false, I tried the following, but it throws an error.

{% if !sick %}
    Kenny is NOT sick.
{% elseif dead %}
    You killed Kenny! You bastard!!!
{% else %}
    Kenny looks okay --- so far
{% endif %}

Answer 1

You should use not keyword as negation.

{% if not sick %}
    Kenny is NOT sick.
{% elseif dead %}
    You killed Kenny! You bastard!!!
{% else %}
    Kenny looks okay --- so far
{% endif %}

Following this documentation page and this answear.