# Truthy and falsy

When a non-boolean[ data type](/impulse-user-manual/content-manipulators-motators/liquid-field/basics/types.md) is used in a boolean context (such as a conditional tag), Liquid decides whether to evaluate it as `true` or `false`. Data types that return `true` by default are called **truthy**. Data types that return false by default are called **falsy**.

### Truthy <a href="#truthy" id="truthy"></a>

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:

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

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

[Strings](https://shopify.github.io/liquid/basics/types/#string), even when empty, are truthy. The example below will create empty HTML tags if `category` exists but is empty:

Input

```
{% if category %}
  <h1>{{ category }}</h1>
{% endif %}
```

Output

```
  <h1></h1>
```

### Falsy <a href="#falsy" id="falsy"></a>

The only values that are falsy in Liquid are `nil` and `false`.

### Summary <a href="#summary" id="summary"></a>

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    | •      |       |


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