Solidity
Solidity is the primary programming language for writing smart contracts on Ethereum and other EVM-compatible blockchains, with versions ranging from 0.4.x through 0.8.x.
In Depth
Solidity is a statically typed, contract-oriented language that compiles to EVM bytecode. It's been through major evolution since its early 0.4.x days. Pre-0.8.0 versions required SafeMath libraries to prevent integer overflow because arithmetic silently wrapped on overflow. Solidity 0.8.0 introduced built-in overflow checks and custom errors. Each compiler version carries its own set of quirks and known bugs. The Solidity team maintains a public list of compiler bugs that auditors should check against the target version. Writing secure Solidity goes beyond language features: it requires understanding EVM execution semantics and storage layout trade-offs. For a thorough review of your Solidity code, see Recon's Solidity security audit services and the smart contract security guide.
Frequently Asked Questions
What is Solidity?
Solidity is the most widely used programming language for writing smart contracts on Ethereum and EVM-compatible chains. It's statically typed with syntax similar to JavaScript and C++. Contracts written in Solidity compile to EVM bytecode and run on-chain.
Which Solidity version should I use?
Use 0.8.x for new projects — it includes built-in overflow protection and custom errors for cheaper reverts. Avoid pre-0.8 versions unless you're maintaining legacy code, and always pin a specific compiler version (e.g., 0.8.24) rather than using floating pragmas. Check the Solidity compiler bug list for known issues in your chosen version.