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The lex step is where the language takes the raw code you've written and converts it into an easily parsable structure. How programming languages workĮvery programming language is different in the way it runs, but many consist of a couple fundamental steps: lexing and parsing. In addition, learning about programming language internals can help you better understand the internals of programming languages you use every day, which can make you a better programmer. This allows you to make a language with things you like from other languages and none of the stuff you don't. This allows you to shape exact how each aspect of your language works and how a developer interacts with it.

When you write your own programming language, you control the entire programmer experience. Making your own programming language with Python Why make your own language?