Dafny: The Programming Language for Building Provably Correct Code

Dafny is a verification-aware programming language with native support for specification writing and equipped with a static program verifier. It combines automated reasoning with familiar programming practices, enabling developers to write code that is provably correct according to its specifications. Dafny compiles to multiple mainstream languages including C#, Java, JavaScript, Go, and Python, seamlessly integrating into existing workflows. By incorporating rigorous verification into the development process, Dafny effectively reduces costly errors discovered late in the cycle. Its ecosystem includes a complete toolchain with verification engines, compilers, IDE plugins, language servers, and more, supporting common programming concepts such as integers, classes, arrays, generics, while providing mathematical proof tools like quantifiers, computation proofs, and conditional verification. In fields with extremely high reliability requirements such as AI and autonomous driving, Dafny’s formal verification technology holds significant application value.