Learn SOLIDITY with Real Code Examples
Updated Nov 19, 2025
Installation Setup
Install Node.js
Install Hardhat or Foundry
Install MetaMask or similar wallet
Set up a local Ethereum node (via Hardhat, Ganache, or Anvil)
Write and compile Solidity contracts
Environment Setup
Install Hardhat or Foundry
Create project directory
Configure networks & private keys
Write contract
Compile & deploy
Config Files
hardhat.config.js
foundry.toml
truffle-config.js
package.json
.env
Cli Commands
npx hardhat compile
npx hardhat test
forge build
forge test
npx hardhat run scripts/deploy.js
Internationalization
Solidity supports UTF-8 strings
Smart contracts are language agnostic
UI translations handled off-chain
Multi-language documentation available
Blockchain-readable formats universal
Accessibility
Remix for beginners
Debug traces & logs
Hardhat console
Solidity documentation
Contract verification explorers
Ui Styling
Solidity does not handle UI
Used via Web3.js/Ethers.js front-ends
Data displayed through dApps
Smart contracts act as backend
UI handled entirely off-chain
State Management
State variables stored on-chain
Mappings manage balances
Events for off-chain syncing
Immutables reduce gas
Storage slots for proxy patterns
Data Management
Structs & arrays
ABI encoding/decoding
Calldata vs memory vs storage
Event logs
Oracles for external data