liquid/_basics/truthy-and-falsy.md

title, description

title	description
Truthy and falsy	An overview of boolean logic in the Liquid template language.

In programming, anything that returns true in a conditional is called truthy. Anything that returns false in a conditional is called falsy. All object types can be described as either truthy or falsy.

• Truthy
• Falsy
• Summary

Truthy

All values in Liquid are truthy except nil and false.

In the example below, the text "Tobi" is not a boolean, but it is truthy in a conditional:

{% raw %}
{% assign name = "Tobi" %}

{% if name %}
  This text will always appear since "name" is defined.
{% endif %}
{% endraw %}

[Strings]({{ "/basics/types/#string" | prepend: site.baseurl }}), even when empty, are truthy. The example below will create empty HTML tags if page.category exists but is empty:

Input

```liquid {% raw %} {% if page.category %}

{{ page.category }}

{% endif %} {% endraw %} ```

Output

```html

```

Falsy

The falsy values in Liquid are [nil]({{ "/basics/types/#nil" | prepend: site.baseurl }}) and [false]({{ "/basics/types/#boolean" | prepend: site.baseurl }}).

Summary

The table below summarizes what is truthy or falsy in Liquid.

	truthy	falsy
true	•
false		•
nil		•
string	•
empty string	•
0	•
integer	•
float	•
array	•
empty array	•
page	•
EmptyDrop	•