w3resource

HTML checked attribute

checked

The purpose of the HTML checked attribute is to define whether a checkbox or a radio button is checked (i.e. selected).

Supported elements

HTML checked attribute supports input element.

Syntax

<input checked="value" / >

Type of value

Checked.

Value

Checked. If set, then selects the checkbox or radio button by default.

Default value

There is no default value.

Supported doctypes

HTML 4.01 strict, HTML 4.01 transitional, HTML 4.01 frameset.

Example of HTML checked attribute with input checkbox

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<title>Example of HTML checked attribute with input checkbox </title>
</head>
<body>
<form action="action.php" method="post">
<input type="checkbox" name="age" value="adult" checked="checked"/> I am above 18. <br/> 
</form>
</body>
</html>

Result

html checked attribute with input checkbox

View this example in a separate browser window

Example of HTML checked attribute with input check box.

Example of HTML checked attribute with input radio button

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<title>Example of HTML checked  attribute with radio button</title>
</head>
<body>
<form action="action.php" method="post">
<input type="radio" name="age" value="adult" checked="checked"/>I am above 18.<br/> 
</form>
</body>
</html>

Result

html checked attribute with input radio button

View this example in a separate browser window

Example of HTML checked attribute with input radio button.

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