Awk has everything "real" languages have. The same math, flow control and data structures. It also has a subset of string mangling ops that give it the "illegible" appearance. But it is fine as a general purpose dynamic scripting language. As an example:

http://kmkeen.com/awk-music/

It could be clearer without the variable-name golfing and as a seperate .awk file (instead of a CLI one-liner) but it reads pretty much the same as C without any pesky type declarations.