Test if even: even

The even test checks whether an integer is even (divisible by 2 with no remainder). It returns true for even numbers and false for odd numbers.

This is commonly used in loops to apply alternating styles or logic to every other item. For example, you might use it to alternate row colors in a Markdown table or to apply different formatting to even-numbered items in a list displayed on a dashboard.

Usage

Here’s how to use this template function. Copy any example and adjust it to your setup.

{% if 4 is even %}
  It is even
{% endif %}

It is even

Function signature

The signature is a technical summary of this template function. It shows the name of the function, the values (called parameters) it accepts, and what type of data each parameter expects (for example, a piece of text or a number).

Function parameters that have a = with a value after them are optional. If you leave them out, the default value shown is used automatically.

Function parameters without a = are usually required. A few optional parameters have no default value, so the signature shows them without a = as well. To check whether a parameter is required, look at the parameter list below the signature. Each parameter is marked as Required or Optional.

The most common optional parameter without a default value is default. The default parameter sets the value a function returns when the function can’t produce a result, for example, when float gets text that isn’t a number. If you leave out default, there is no fallback value, so most functions raise an error and the template fails. The parameter list of each function says what happens. If you set default, the function returns your value instead.

round(
    value: Any,
    precision: int = 0,
    method: str = "common",
    default: Any,
) -> float | int | Any

even(
    value: int,
) -> bool

Function parameters

The following parameters can be provided to this test.

Good to know

• Zero is considered even.
• The input must be an integer. Passing a float or string raises an error.

Try it yourself

Ready to test this? Open Settings > Tools > Template, paste the example into the Template editor, and watch the result update on the right. Edit the values to see how the function adapts to your own entitiesAn entity represents a sensor, actor, or function in Home Assistant. Entities are used to monitor physical properties or to control other entities. An entity is usually part of a device or a service. [Learn more].

More examples

Real scenarios where this function comes up in automations and templates. Copy any example and adapt it to your setup.

Check various numbers

{{ 4 is even }}
{{ 7 is even }}
{{ 0 is even }}

true
false
true

Filter even numbers from a list

Use select to extract only even numbers from a range.

{{ range(1, 11) | select("even") | list }}

[2, 4, 6, 8, 10]

Alternating logic in a loop

Apply different formatting to even and odd iterations.

{% for i in range(1, 5) %}
  {{ i }}: {{ "even" if i is even else "odd" }}
{% endfor %}

1: odd
2: even
3: odd
4: even

Still stuck?

The Home Assistant community is quick to help: join Discord for real-time chat, post on the community forum with your template and expected result, or share on our subreddit /r/homeassistant.

Related template functions

These functions work well alongside this one:

• Test if odd: odd - Tests whether a number is odd.

• Test if divisible by: divisibleby - Tests whether a number is divisible by another number.

• Convert to integer: int - Converts a value to an integer, with an optional default if conversion fails.