# HTML <output> for Attribute

HTML <output> tag

## Example

Perform a calculation and show the result in an <output> element:

<form oninput="x.value=parseInt(a.value)+parseInt(b.value)">0
<input type="range" id="a" value="50">100
+<input type="number" id="b" value="50">
=<output name="x" for="a b"></output>
</form>
Try it yourself »

## Definition and Usage

The for attribute specifies the relationship between the result of the calculation, and the elements used in the calculation.

## Browser Support

The numbers in the table specify the first browser version that fully supports the attribute.

Attribute |  |  |  |  |
--- | --- | --- | --- | --- | ---
for | 10.0 | Not supported | 4.0 | 5.1 | 11.0

## Differences Between HTML 4.01 and HTML5

The <output> tag is new in HTML5.

## Syntax

<output for="element_id">

## Attribute Values

Value | Description
--- | ---
element_id | Specifies a space separated list of ids of one or more elements that specifies the relationship between the result of the calculation, and the elements used in the calculation

HTML <output> tag

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