HTML
1
2
<html>3
<head>4
<title> Hello World! </title>5
</head>6
<body>7
<h1> Hello World!</h1>8
</body>9
</html>CSS
x
1
JavaScript
1
1
Output:
<html> <head> <title> Hello World! </title> </head> <body> <h1> Hello World!</h1> </body></html>