For Ethereum Dev workshop

workshop.sol

// SPDX-License-Identifier: MIT
pragma solidity >=0.8.4;

contract MyFirstContract{

    // string, integers (uint, int), address
    address myAddress = 0x5B38Da6a701c568545dCfcB03FcB875f56beddC4;
    uint number = 2024;
    int negativeNumber = -2024;
    string name = "Jesserc";

    function retrieveAllVars() public view returns(address,uint,int, string memory){
        return (myAddress,number,negativeNumber,name);
    }

    function updateAddress(address newAddr) public {
        myAddress = newAddr;
    }

    function updateNumber(uint newNumber) public {
        number = newNumber;
    }

    function updateNegNumber(int newNegNumber) public {
        negativeNumber = newNegNumber;
    }

    function updateName(string memory newName) public {
        name = newName;
    }
}