# Euclid

> imperative programming language for writing verifiable programs

**Wikidata**: [Q5406088](https://www.wikidata.org/wiki/Q5406088)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Euclid_(programming_language))  
**Source**: https://4ort.xyz/entity/euclid-q5406088

## Summary
Euclid is an imperative programming language designed for writing verifiable programs. It was developed in 1977 by Ric Holt and designed by Butler Lampson. The language features strong static typing and supports multiple programming paradigms including procedural, imperative, structured, and functional programming.

## Key Facts
- Developed in 1977 by Ric Holt, a Canadian computer scientist
- Designed by Butler Lampson, an American computer scientist born in 1943
- Instance of both a general programming language and a procedural programming language
- Features strong static typing discipline
- Supports procedural, imperative, structured, and functional programming paradigms
- Wikipedia title: Euclid (programming language)
- Available in English, Macedonian, and Norwegian Wikipedia languages
- Freebase ID: /m/03fbrg
- Has 3 sitelinks across Wikipedia languages

## FAQs
### Q: What type of programming language is Euclid?
A: Euclid is an imperative programming language designed for writing verifiable programs. It features strong static typing and supports multiple paradigms including procedural, imperative, structured, and functional programming.

### Q: Who created Euclid and when?
A: Euclid was developed in 1977 by Ric Holt, a Canadian computer scientist, and designed by Butler Lampson, an American computer scientist. Holt was born in 1941 and Lampson was born in 1943.

### Q: What makes Euclid unique among programming languages?
A: Euclid is specifically designed for writing verifiable programs, which distinguishes it from many other programming languages. It combines strong static typing with support for multiple programming paradigms including procedural, imperative, structured, and functional approaches.

### Q: What is the typing discipline of Euclid?
A: Euclid uses strong static typing, which means type checking occurs at compile time and variables have fixed types that cannot be changed during program execution.

## Why It Matters
Euclid represents an important contribution to the field of programming languages, particularly in the area of verifiable software development. By combining strong static typing with multiple programming paradigms, Euclid provides a robust framework for creating programs that can be mathematically verified for correctness. This is especially valuable in domains where software reliability is critical, such as aerospace, medical devices, and financial systems. The language's design by Butler Lampson, a renowned computer scientist, and development by Ric Holt demonstrates the collaborative nature of programming language innovation. Euclid's approach to verifiable programming influenced subsequent language designs and contributed to the broader understanding of how programming languages can support formal verification methods.

## Notable For
- Designed specifically for writing verifiable programs, making it unique among programming languages
- Combines strong static typing with support for multiple programming paradigms
- Developed by Ric Holt and designed by Butler Lampson, both prominent computer scientists
- One of the earlier programming languages to emphasize formal verification capabilities
- Influenced the development of subsequent languages focused on program verification

## Body
### Development and Design
Euclid was developed in 1977 by Ric Holt, a Canadian computer scientist, and designed by Butler Lampson, an American computer scientist. The language emerged during a period when there was growing interest in formal verification methods for software development. Holt and Lampson brought their expertise in computer science and programming language design to create a language that would facilitate the creation of verifiable programs.

### Technical Characteristics
The language features strong static typing, which means that type checking occurs at compile time rather than runtime. This approach helps catch type-related errors early in the development process and contributes to the language's goal of supporting verifiable programs. Euclid supports multiple programming paradigms, including procedural, imperative, structured, and functional programming, giving developers flexibility in how they approach problem-solving while maintaining the benefits of strong typing.

### Classification and Relationships
Euclid is classified as both a general programming language and a procedural programming language. It has relationships with other programming language categories and has influenced the development of subsequent languages focused on program verification. The language has 3 sitelinks across different Wikipedia language editions, indicating its presence in multiple linguistic contexts.

### Historical Context
The development of Euclid in 1977 came during a period of significant innovation in programming language design. The emphasis on verifiable programs reflected growing concerns about software reliability and the need for formal methods in critical applications. Butler Lampson's involvement connected Euclid to the broader tradition of influential programming language design, as he was already recognized as a leading figure in computer science.