So as you see, JavaScript is written as plain text, like HTML and our CSS, and…JavaScript is what's called an interpreted language, not a compiled language.…A lot of other languages need to be run through a special program called a…compiler that takes your code, converts it into machine code, which can then run…on the operating system, but we don't need to do that with JavaScript.…We simply write our code and we hand it over to the web browser, and the web…browser takes care all interpreting it and running it on the machine.…Now, JavaScript is case sensitive.…

Let me repeat that.…JavaScript is case sensitive!…If you're coming from a case-insensitive language, like Visual Basic or Pascal or…even old-school HTML, you may want to write that down and stick it in front of…your face for a while, because it's really important.…Now this is often a challenge for web designers coming from years of handwriting…HTML, where, okay, it's good practice to be consistent, but really if you open a…lowercase p tag and close with an uppercase P tag, it doesn't really matter.…