JavaScript basics

Before we start diving into the various data structures and algorithms, let's have a quick overview of the JavaScript language. This section will present the JavaScript basics required to implement the algorithms we will create in the subsequent chapters.

To start, let's take a look at the two different ways we can use JavaScript code on an HTML page:

<!DOCTYPE html> 
<html> 
  <head> 
    <meta charset="UTF-8"> 
  </head> 
  <body> 
    <script> 
      alert('Hello, World!'); 
    </script> 
  </body> 
</html>

The first way is demonstrated by the previous code. We need to create an HTML file and write this code on it. In this example, we are declaring the script tag inside the HTML file and, inside the script tag, we have the JavaScript code.

For the second example, ...

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