As a summary, what can I say? We started out in first grade with
_ + 3 = 5
and advanced to defining what went in place of the blank space with a variable. Along the way, we looked at how to assign and access the two types of variables allowed in shell programmingscalars and arrays.
Remember, if a variable is read-only, do not attempt to change it; just put your keyboard down and back away slowly!
In Chapter 4, "Regular Expressions," you look at one of the most powerful ways of manipulating values. You explore regular expressions and delve into pattern matching.