This smart contract is a basic implementation in Solidity that lets you store a number, retrieve it, and keep a list of people with their favorite numbers.

• Stores a number on the blockchain
• Retrieves the stored number
• Adds people with a name and favorite number using a struct

State Variables

• uint256 favNumber: Public variable to store a number
• People[] people: Dynamic array of a custom struct

Structs Used to define a custom type:

struct People {
    uint256 favNumber;
    string name;
}

Functions

• store(uint256 _favNum): Stores a number on-chain
• retrive(): Returns the stored number (read-only)
• addPeople(uint256 _favNumber, string memory _name): Adds a new person to the array

Data Locations

• memory is used for temporary input like _name
• storage is used for state variables like people

• Solidity ^0.8.7
• Remix IDE

• SimpleStorage.sol

I’ve created different branches in this repository for each topic I’ve learned (e.g. functions, memory vs storage, structs & arrays, visibility). Each branch focuses on a specific concept for better understanding and reference.