Solidity Basics

Solidity is a contract-oriented, high-level language for implementing smart contracts. It is designed to target the Ethereum Virtual Machine (EVM). This guide will cover the basics of Solidity, including syntax, data types, and functions.

Data Types

Solidity supports several data types, including:

Boolean: Represents true or false values.
Integer: Represents whole numbers.
Fixed-point number: Represents numbers with a fixed number of decimal places.
Address: Represents an Ethereum address.
String: Represents text.

Example

bool isTrue = true;
uint256 myNumber = 42;
address myAddress = 0x1234567890123456789012345678901234567890;
string myString = "Hello, world!";

Functions

Functions are blocks of code that can be called to perform a specific action. They can take parameters and return values.

Example

function addNumbers(uint256 a, uint256 b) public pure returns (uint256) {
    return a + b;
}

Smart Contracts

Smart contracts are self-executing contracts with the terms of the agreement directly written into lines of code. They run on the Ethereum blockchain and are immutable once deployed.

Example

pragma solidity ^0.8.0;

contract SimpleStorage {
    uint256 public storedData;

    function set(uint256 x) public {
        storedData = x;
    }

    function get() public view returns (uint256) {
        return storedData;
    }
}

Learn More

For more information on Solidity, visit our Solidity documentation.