The JavaScript code can be kept into html page inside <script>
tag.
<!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title>Demo</title> </head> <body> <p style="color:red">Hello world using HTML!</p> <script> document.write("<b>Hello world using JavaScript!</b>"); </script> </body> </html>
Above code snippet, shall write the text in inverted comma on the page in bold style.
Note that <script>
block ideally should be written inside the <head>
</head>
block however it can be kept anywhere inside the <body>
</body>
tag also.