How Computers Read Your Code

Computers do not read code as sentences, but break them into raw building blocks called tokens. This process strips away the human meaning and reduces your instructions to strict grammatical categories.

Think of this as a sophisticated puzzle where a lexer dismantles text into identifiers, operators, and keywords. Unlike the AI in large language models that guesses patterns based on probability, a lexer follows a rigid set of logic rules. Once the text is chopped into these specific chunks, the computer can finally understand how to execute your commands. It is the vital first step that transforms simple typed characters into a functional digital program.