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How to write "Hello, World!" program in JavaScript?
JavaScript can be implemented using JavaScript statements that are placed within the <script>... </script>.
You can place the <script> tags, containing your JavaScript, anywhere within your web page, but it is normally recommended that you should keep it within the <head> tags.
Let us take a simple example to print out "Hello World". We added an optional HTML comment that surrounds our JavaScript code. This is to save our code from a browser that does not support JavaScript. The comment ends with a "//-->".
Here "//" signifies a comment in JavaScript, so we add that to prevent a browser from reading the end of the HTML comment as a piece of JavaScript code. Next, we call a function document.write, which writes a string into our HTML document.
<html>
<body>
<script>
<!--
document.write("Hello World!")
//-->
</script>
</body>
</html>
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