Arrays are a powerful feature of any language. They let you house multiple pieces of information easily. They will maintain the order of items being added and can even be sorted. In modern web browsers, they even handle auto-magically converting themselves into human readable strings. Even with the modern niceties, it’s still good to know how to convert an array to a string for those times when you need to massage an array into another format, or want to do something more than simply comma separ...