### 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.

### License

BSD License

### Topics

- Computer science/Functional programming

### Session Hello_World

- IO
- HelloWorld
- HelloWorld_Proof
- RunningCodeFromIsabelle

## Cite

×

Hello_World-AFP

    @article{Hello_World-AFP,
      author  = {Cornelius Diekmann and Lars Hupel},
      title   = {Hello World},
      journal = {Archive of Formal Proofs},
      month   = {March},
      year    = {2020},
      note    = {\url{https://isa-afp.org/entries/Hello_World.html},
                 Formal proof development},
      ISSN    = {2150-914x},
    }

Download

## Download

× Download latest

Older releases:

- Sep 13, 2023 : Isabelle2023
- Oct 27, 2022 : Isabelle2022
- Dec 14, 2021 : Isabelle2021-1
- Feb 23, 2021 : Isabelle2021
- Apr 18, 2020 : Isabelle2020
- Mar 23, 2020 : Isabelle2019