TUTORIAL
JavaScript Tutorial - Hello World
Hello World in JavaScript
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In this tutorial, we’re going to do a simple Hello World program in JavaScript as the starting point of our JavaScript tutorial.
JavaScript Hello World
<!DOCTYPE HTML>
<html>
<body>
<p>JavaScript Tutorial</p>
<script>
alert( 'Hello, world!' );
</script>
</body>
</html>
<script>
alert( 'Hello, world!' );
</script>
When we embed JavaScript in a web page, we always have to embed it within the script tags <script>...</script>.
alert('Hello, world!');
It is simply an alert with information Hello World! within the parenthesis, and then it ends with a semicolon.
If you save the above code to a file named like helloworld.html and then view it in a browser, you will get a pop-up box saying Hello world!.
Basic JavaScript Syntax Rules
Before we continue to learn JavaScript further, we should get some basic syntax rules of this scripting language.
- JavaScript is case sensitive. It is valid for both variables and functions.
- Each statement ends with a semicolon.
