# Hello World

 Title: Hello World Authors: Cornelius Diekmann and Lars Hupel Submission date: 2020-03-07 Abstract: In this article, we present a formalization of the well-known "Hello, World!" code, including a formal framework for reasoning about IO. Our model is inspired by the handling of IO in Haskell. We start by formalizing the 🌍 and embrace the IO monad afterwards. Then we present a sample main :: IO (), followed by its proof of correctness. BibTeX: @article{Hello_World-AFP, author = {Cornelius Diekmann and Lars Hupel}, title = {Hello World}, journal = {Archive of Formal Proofs}, month = mar, year = 2020, note = {\url{http://isa-afp.org/entries/Hello_World.html}, Formal proof development}, ISSN = {2150-914x}, } License: BSD License Status: [ok] This is a development version of this entry. It might change over time and is not stable. Please refer to release versions for citations.