HTML | <output> form Attribute

The HTML <output> form Attribute is used to specify that the <output> element can contain one or more forms.

Syntax:

<output form="form_id">

Attribute Values: It contains single value form_id which contains the value i.e form_id which specify the one or more than the output element belongs to. The value of this attribute should be id of the <form> element.

Example:

html

<!DOCTYPE html>
<html>
    <head>
        <title>
            HTML output Form Attribute
        </title>
         
        <style>
            body {
                text-align:center;
            }
            h1 {
                color:green;
            }
        </style>
    </head>
     
    <body>
        <h1>GeeksforGeeks</h1>
         
        <h2>&lt;output&gt;Form Attribute</h2>
         
        <form oninput = "sumresult.value = parseInt(A.value)
                    + parseInt(B.value) + parseInt(C.value)">
            <input type = "number" name = "A" value = "50" /> +
            <input type = "range" name = "B" value = "0" /> +
            <input type = "number" name = "C" value = "30" /><br>
             
            Result: <output form ="myGeeks" name = "sumresult">
            </output>
        </form>
    </body>
</html>                   