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This may be the beginning of a grand adventure. Programming languages encompass a huge space to explore and play in. Plenty of room for your own creations to share with others or just enjoy yourself. Brilliant computer scientists and software engineers have spent entire careers traversing this land without ever reaching the end. If this book is your first entry into the country, welcome.

The pages of this book give you a guided tour through some of the world of languages. But before we strap on our hiking boots and venture out, we should familiarize ourselves with the territory. The chapters in this part introduce you to the basic concepts used by programming languages and how those concepts are organized.

We will also get acquainted with Lox, the languages we'll spend the rest of the book implementing(twice).

这将是一次伟大的冒险。程序编程拥有无限的探索和应用空间。你可以与他人分享编程乐趣或者只是自娱自乐。杰出的计算机科学家和软件工程师一直在编程领域探索，终其一生乐在其中。如果你是第一次接触这个领域，欢迎你！

本书将引导你参观语言世界。但在我们开始冒险之前，需要先了解要踏足的土地。接下来，将介绍编程语言中的常用概念和这些概念的组织方式。

我们还将介绍一门新的语言 Lox, 本书会带你实现 Lox 语言（2次）。