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Dafny

Dafny is an imperative and functional compiled language that compiles to other programming languages, such as C#, Java, JavaScript, Go, and Python. It supports formal specification through preconditions, postconditions, loop invariants, loop variants, termination specifications and read/write framing specifications. The language combines ideas from the…

Overview, Proof features & Data types

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Topic orientation

Dafny at a glance

The strongest research directions include Proof features. Use the connected concepts below as starting points, not as a keyword checklist.

Research this topic

Explore the main themes, entities and connections around Dafny. Start with the topic map, then use the sections below for research and deeper semantic analysis.

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Start with a few of the strongest sections from the source topic. These are research directions, not a list of keywords you must use.

Key facts & relationships

High-confidence facts extracted from structured source data. Use them as anchors for further research.

Designed by
K. Rustan M. Leino
Developer
Microsoft Research
Filename extensions
.dfy
First appeared
2009; 17 years ago (2009)
License
MIT
Paradigm
Imperative, functional

Topics to explore

A structured outline of related entities, concepts and subtopics. Open any item to build a new map centered on it.

Browse the full topic structure. Each item opens a new analysis centered on that subject.

Overview

Data types

Loop invariants

Proof features

Advanced semantic analysis

Deeper signals for content research, entity SEO and topical coverage. The plain-language headings explain what each technical view is useful for.

How this topic connects Entity context

Quick relationship hints grouped by predicate. Useful for spotting recurring semantic connections around the current entity.

See the strongest relationship patterns around the current topic before diving into the raw triples.

Dafny

Top relations

related to Further reading · 19
Dafny → Apress, Bertrand, Boro, Dafny Language, Elba Island, International Summer School, Introducing Software Verification, ISBN, Italy, LASER, Martin, Meyer, Nordio, Practical Software Verification, Proving Program Correctness, Revised Tutorial Lectures, Sitnikovski, Springer, Tools
related to Loop invariants · 11
Dafny → From, Hoare, However, In, Information, Length, NOP, The, This, To, Variables
related to Proof features · 8
Dafny → Although, As, Case, Here, NatSumLemmaproves, Specifically, The, This
related to External links · 5
Dafny → Functional Correctness, GitHub, Language, Microsoft ResearchDafny, Program Verifier
related to Imperative features · 3
Dafny → Likewise, The, This
related to Data types · 2
Dafny → Any, Methods
Designed by · 1
Dafny → K. Rustan M. Leino
Developer · 1
Dafny → Microsoft Research
Filename extensions · 1
Dafny → .dfy
First appeared · 1
Dafny → 2009; 17 years ago (2009)

Important terminology Word statistics

Frequent words and multi-word phrases across the lead, headings, infobox and body. Useful for terminology coverage.

Use these terms to understand the vocabulary surrounding the topic, not as a checklist for keyword stuffing.

Important terminology

loop verification language imperative proof functional programming specification also invariants inductive logic software features known program includes java microsoft research

Entity relationships Subject–Predicate–Object triples

Extracted RDF-like relationships with confidence and source. The table includes structured facts and lower-confidence contextual relations.
SubjectPredicateObjectConfidenceSrc
DafnyDesigned byK. Rustan M. Leino1.00infobox
DafnyDeveloperMicrosoft Research1.00infobox
DafnyFilename extensions.dfy1.00infobox
DafnyFirst appeared2009; 17 years ago (2009)1.00infobox
DafnyLicenseMIT1.00infobox
DafnyParadigmImperative, functional1.00infobox
DafnyStable release4.11.0 / August 25, 2025; 11 months ago (2025-08-25)1.00infobox
DafnyTyping disciplineStatic, strong, safe1.00infobox
DafnyWebsitedafny.org1.00infobox
Dafnyis aimperative and functional compiled language that compiles to other programming languages0.90text
Dafnyrelated to Data typesMethods0.60section
Dafnyrelated to Data typesAny0.60section

Related concept clusters Concept neighborhoods

Clusters of nearby vocabulary surrounding the topic. Scan them for adjacent concepts and language you may have missed.

These clusters group vocabulary that occurs around closely connected concepts in the source material.

    Connections between topic areas Semantic bridges

    Bridge nodes connect otherwise separate parts of the map. Expand a row to inspect the topic groups on each side.

    Bridges can reveal useful research angles that are easy to miss in a flat list of related terms.

    Map overview Semantic statistics

    Number of nodes, edges, triples, density and central hubs. Use it to gauge the size and connectivity of the map.

    Dafny

    Nodes38
    Edges37
    Triples58
    Avg. degree1.95
    Density0.052632
    Components1
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