What is Solidity?

Solidity is a statically-typed, object-oriented programming language designed specifically for writing smart contracts on Ethereum and other EVM-compatible blockchains. Created by the Ethereum team (Christian Reitwiessner, Gavin Wood, et al.), first proposed in 2014. Key characteristics: (1) Syntax — influenced by JavaScript, C++, and Python; compiled to EVM bytecode; (2) Statically typed — variables must declare their type; (3) Contract-oriented — the primary unit is a contract (like a class); (4) Versioning — every Solidity file declares the compiler version: pragma solidity ^0.8.0;; (5) Data locations — variables can be in storage (persistent), memory (temporary), or calldata (read-only arguments); (6) Security-critical — bugs in smart contracts can result in permanent loss of funds; security is paramount. The current stable version is 0.8.x (with significant safety improvements like built-in overflow protection added in 0.8.0).