Although this just a scripting language, but it's more similar to high-levels programming languages such as Java and C/C++. Programmers who ever learn programming language must be familiar with this scripting language. A long time ago, kind of this scripting language are VBScript which uses in Microsoft Excel functions.
Just copy paste this code to your favorite text editor then save as helloworld.html, then open this file with your web browser. You will see text inside your browser like this.