13. Showing Prompt Box
JavaScript
<!DOCTYPE html>
<html>
<head>
<title>Prompt
Box</title>
</head>
<body>
<script>
var userName = prompt("Please enter your
name:", "John Doe");
if (userName != null) {
alert("Hello " + userName +
"!");
}
</script>
</body>
</html>
This will display a prompt box where
the user can enter their name.
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