Book excerpt: Ever heard of Tcl? If you haven't, Tcl is a powerful scripting language created by John Ousterhout in 1988 while he was a professor at Berkeley. His goal was to provide a simple yet powerful language that could be easily embedded into applications. While it is not as widely known as languages like Python or JavaScript, Tcl has a number of features that make it worth learning. For one thing, Tcl is very easy to pick up. The syntax is straightforward, and there are only a few commands to learn. This makes it ideal for those who are new to coding or who want to quickly write scripts without having to invest a lot of time in learning a new language. Another advantage of Tcl is its portability. The language is available on Windows, macOS, and Linux. Thus, we can write code that can be run on multiple operating systems without making any changes. This book, "Tcl Programming Foundations: Unlocking the Power of Tcl Scripting," covers everything you need to know to start coding in Tcl. So, let’s get started!