Coding is what makes it possible for people to create computer software, apps and websites. Your browser, your OS, the apps on on your phone, Facebook, and this website-they're all made with code.
This is a simple line of code.print 'hello, world! '
Many coding tutorials use that command as their very fist example because its' one of the simplest examples you can have-it 'prints' (DISPLAYS) the text 'hello, world!' onto the screen.
If you have no knowledge about coding then this page will help you. I have put together the most basic beginner's tutorial which will give you all the background information you need on coding, before you begin.