Verified Functional Programming in Agda

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Agda, an advanced programming language rooted in Type Theory, features a highly expressive type system that facilitates full functional verification of programs. It offers two verification styles: external verification involves creating pure functional programs alongside separate proofs of their properties, while internal verification incorporates property specifications directly into the program's types, often requiring embedded proofs. This dual capability empowers programmers to ensure the absence of bugs, significantly enhancing software quality and reliability beyond traditional methods.