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Foundations · easy

1. What Solidity is

A contract-oriented language compiled to EVM bytecode.

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Solidity is a statically typed, contract-oriented language that compiles to EVM bytecode. That bytecode is stored on chain at an address, and anyone can call its functions by sending a transaction.

Every file starts with a licence comment and a pragma that pins the compiler version, then declares one or more contracts.

solidity
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.24;

contract Hello {
    string public greeting = "gm";
}

Compiling produces two artefacts you will use constantly: the bytecode (deployed to the chain) and the ABI (a JSON description your front-end uses to encode calls).

How to study this topic

  1. 1. Read the explanation once end to end, skipping the code.
  2. 2. Re-read the code snippets and say out loud what each line does.
  3. 3. Answer the quiz without scrolling back — that is the real check.
  4. 4. Read every explanation, even for the answers you got right.

Scoring

  • · Up to 30 XP from quiz accuracy.
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  • · +5 XP while a 3-day streak is running.
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Check your understanding

  1. 1. What does the Solidity compiler produce?

  2. 2. What does `pragma solidity ^0.8.24;` do?

  3. 3. Where does a deployed contract live?

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