As you know by now, nearly everything in Red gets written inside [ ]. These denote blocks, which are a kind of series. Blocks and series form the foundation of Red code; in fact, if you look at the type hierarchy in Chapter 3, Using Words, Values, and Types, a block is also a series! type. A series! type contains a lot of other common types besides blocks, such as strings, files, binary values, tags, emails, images, and so on. That's why the functions and actions that work with block series can be applied to other types of values. For example, strings are essentially series of characters, and so the techniques used to manipulate block series can also be used for string operations.
In this chapter, we will learn ...
