It is amazing how picky software development can be. If you forget a semicolon, or put a comma in the incorrect place it can result in a lot of errors. You really have to go through each line one by one to find out where you made the mistake. Having a fresh pair of eyes looking at it does help, as my wife has found many of my mistakes that I just could not find. If you are thinking about learning how to code, I would recommend doing it slowly, making sure each line is correct before you end up writing like 50 lines then having to go through each one to find out where your one little mistake is, like a missing semicolon.