This is for a tutorial that teaches datatypes

DataTypesTutorial.sol

// SPDX-License-Identifier: GPL-3.0
pragma solidity ^0.8.17;

contract VariablesAndDataTypes {
    // State Variables
    int256 public oneIng = 1;
    uint256 public oneUint = 1;

    // Local Variable
    function getValue() public pure returns(uint256) {
        uint256 value = 1;
        return value;
    }

    // Strings and Bytes32
    string public helloWorld = "Hello World!!";
    bytes32 public helloWorld32 = "Hello World!!";

    // Addresses
    address public myAddress = 0xC96146959790EfB2e354802f664090fCc75296D6;

    // Struct
    struct AuctionItem {
        address nftContract;
        address payable seller;
        address payable royaltyAddress;
        uint256 itemId;
        uint256 tokenId;
        uint256 floorPrice;
        uint256 royalty;
        bool sold;
        bool started;
        bool ended;
    }

    // Data Types
    bool public a = true;
    // uint256 = 0 to 2**256 - 1
    uint256 public u256 = 321; 

    // uint8 = 0 to 2**8 - 1
    uint8 public u8 = 32; 

    // uint16 = 0 to 2**16 - 1
    uint16 public u16 = 321; 
    
    // int256 = -2**256 - 1 to 2**256 - 1
    int256 public i256 = -321;

    // int8 = -2**8 - 1 to 2**8 - 1
    int8 public i8 = -32;

    int256 public minInt = type(int256).min;
    uint256 public maxUint = type(uint256).max;
    
}