# Leo language By [Nataliiiiii](https://paragraph.com/@iamcryptogirl) · 2024-06-01 --- **Leo** - it **a programming language**, which was designed specifically for building decentralized applications **(dApps)**, guarantors **confidentiality, privacy** data used. This programming language is used by blockchain **Aleo** and was created specifically for the needs of this blockchain. Aleo pays special attention to privacy, confidentiality of user data in its desire to ensure complete security. The Leo programming language is one of the most important components in achieving this goal, along with zero-disclosure proof technologies **(ZKPS)**. Large-scale computational tasks are admirably handled by zero-disclosure proofs (ZKPs) and **the Leo computing language**, on which the Aleo blockchain is built. The amount of computing power offered by the project is simply unique! **Here are some key aspects of the Leo programming language:** 1. **Privacy-Preserving Design and Zero-Disclosure Evidence (ZKPs)** The Leo programming language allows you to ensure the confidentiality, privacy and data security of users who use programs and projects built in this programming language. Zero-disclosure proofs implemented in the Leo programming language allow transactions and their verification without disclosing sensitive user data.. This is a unique technology that allows developers to confirm the correctness of data, while absolutely not revealing the data itself to the verifying party.. 2. **Simplification of complex logic, convenience for developers** Leo is designed to implement complex logic, allowing developers to create complex smart contracts and dApps while maintaining privacy and ease of use. This allows developers to write applications that build on the Aleo blockchain with privacy guarantees, while the applications are easy and convenient to use despite the complex construction logic made possible by the Leo programming language. Aleo and Leo aim to be developer-friendly, encouraging ease of use and rapid adoption. By providing a language tailored for privacy-focused applications, developers can build efficient and secure dApps without requiring a deep understanding of complex cryptographic concepts, enabling ease of development. 3. **Possibility of audit** Despite the emphasis on privacy, Leo ensures that applications built using this language can still be tested, audited and compliant. This is important for the wider adoption of Aleo-based applications. 4. **The nature of open source code** Being open source, Leo allows community input for improvement, fostering a collaborative environment to improve the capabilities of this programming language. Thus, the programming language is open for further upgrades by community members.. Thus, it can be concluded that Leo is an integral component of the Aleo blockchain, embodying a unique programming language that was designed to ensure user privacy and security. With a strong focus on privacy, Leo uses advanced cryptographic techniques, including zero proof of disclosure (ZKPS), to verify transactions and perform calculations while ensuring data privacy. This enables developers to create decentralized applications (dApps) that operate with a higher degree of privacy and security compared to traditional blockchain solutions. Leo's design takes complex logic into account, allowing for the creation of complex smart contracts and dApps. One of the unique aspects of Aleo's approach to DApp development is the accompanying Leo programming language. In my interview with Wu, I suggested that adding another programming language to the blockchain space could negatively impact its adoption. “When we started,” he replied, “we wanted to anchor it in Rust or Typescript so we wouldn't have to reinvent the wheel. It turns out that this is really hard to do, because what you might think is cheap in one programming model turns out to be very expensive in this model. We ended up creating a new language because what the compiler does is very different from the traditional architecture”. How exactly is Leo different from Rust or Typescript? "We have a high-level language that compiles into polynomials that are executed inside the verification system," he said. "The verification system works with polynomials to produce the final result. The end result looks the same as the output of a conventional processor, but it is accompanied by a zero-knowledge proof, which can indicate that the calculation was performed from a certain program on some hidden input data, which can also be made publicly available at the user's discretion. This is the main difference in architecture.” “If you use LLVM for Rust or C++," he continued, "you essentially need to abandon the LLVM architecture and invent a new architecture. The problem is that syntax that you would normally think of as cheap in a high-level language ends up being very expensive”. And you now have a chance to learn the Leo language **ZkCamp**. Get hands-on experience in designing and building private applications on the Aleo blockchain by joining Aleo courses. Join the waiting list here: [**ZKCamp's Aleo Course**](https://www.zkcamp.xyz/aleo) [https://www.zkcamp.xyz/aleo](https://www.zkcamp.xyz/aleo) More information about the blockchain and the programming language used can be found on the official X account (Twitter): [https://twitter.com/AleoHQ](https://twitter.com/AleoHQ) And links to others **Aleo official sources:** * Website ~ [https://www.aleo.org/](https://www.aleo.org/) * Twitter ~ [https://twitter.com/AleoHQ](https://twitter.com/AleoHQ) * Community Twitter ~ [https://twitter.com/aleocommunity](https://twitter.com/aleocommunity) * GitHub ~ [https://github.com/AleoHQ](https://github.com/AleoHQ) * Community Forum — [https://community.aleo.org/](https://community.aleo.org/) * Community Calendar ~ [https://www.aleo.org/community/calendar](https://www.aleo.org/community/calendar) * YouTube — [https://www.youtube.com/channel/UCS\_HKT2heOC\_q88YQLiJt0g](https://www.youtube.com/channel/UCS_HKT2heOC_q88YQLiJt0g) * Developer Documentation ~ [https://developer.aleo.org/](https://developer.aleo.org/) * Leo Playground ~ [https://play.leo-lang.org/](https://play.leo-lang.org/) * Aleo Block Explorer ~ [https://www.aleo.network/](https://www.aleo.network/) * Community Blog ~ [https://medium.com/@AleoHQ](https://medium.com/@AleoHQ) * Announcements Blog ~ [https://www.aleo.org/blog](https://www.aleo.org/blog) --- *Originally published on [Nataliiiiii](https://paragraph.com/@iamcryptogirl/leo-language)*