# Input Component Labels

A label describes the purpose of an input component. To set a label on an input component, use the `label` attribute.

This example shows how to use labels using the `label` attribute on an input component.

```nolang
<lightning:input type="number" name="myNumber" label="Pick a Number:" value="54" />
```

The label is placed on the left of the input field and can be hidden by setting `variant="label-hidden"`, which applies the `slds-assistive-text` class to the label to support accessibility.

## Using `$Label`

Use the `$Label` global value provider to access labels stored in an external source. For example:

```nolang
<lightning:input type="number" name="myNumber" label="{!$Label.Number.PickOne}" />
```

To output a label and dynamically update it, use the `format()` expression function. For example, if you have `np.labelName` set to `Hello {0}`, the following expression returns `Hello World` if `v.name` is set to `World`.

```nolang
{!format($Label.np.labelName, v.name)}
```

**See Also**

- [Supporting Accessibility](/docs/platform/aura-platform/guide/accessibility.md)