Learn SOLIDITY with Real Code Examples

Solidity compiles to EVM bytecode and runs on Ethereum nodes.

It powers smart contracts that govern DeFi, NFTs, DAOs, identity systems, and decentralized automation.

Supports inheritance, modifiers, events, libraries, interfaces, and blockchain-specific features like address types and payable functions.

Contracts, interfaces, abstract contracts

Mappings, structs, arrays

Events & logs

Fallback & receive functions

Error handling: require, revert, assert

Contracts & state variables

Functions (public, private, external)

Mappings, arrays, structs

Modifiers & events

ABI encoding & gas

contracts/

scripts/

test/

deploy/

artifacts/build-info/

Write Solidity contract in .sol file

Compile with Solidity compiler (solc)

Deploy using Hardhat/Foundry/Truffle

Test using Mocha/Chai or Foundry tests

Interact via scripts or dApp front-end

Beginner: ERC-20 token, simple storage contract

Intermediate: NFT collections, staking rewards

Advanced: DEX, lending pools, multi-sig wallets

Expert: zk-integrated contracts, MEV-resistant systems

Solidity vs Rust (Solana): EVM vs non-EVM

Solidity vs Vyper: syntax & security differences

Solidity vs Move (Sui/Aptos): resource model

Solidity vs JavaScript: on-chain vs off-chain logic

Solidity vs Python: static vs dynamic

2014 – Solidity introduced

2016 – Major updates, inheritance

2018 – ABIEncoderV2

2021 – Custom errors

2023–2025 – Optimizer improvements & language hardening

EVM: Ethereum Virtual Machine

ABI: Application Binary Interface

Gas: execution cost

Address: 20-byte account identifier

Event: logged blockchain data