101 Fundamental - Roadmap (ep1. - ep.3)

1. Build 1st smart contract

welcome variable

// SPDX-License-Identifier: MIT (open source)
// Software Package Data Exchange

pragma solidity 0.8.23;

contract Hello {

    string public welcome = "Hello World";

}

2. Variables

• Variables use to store data in our program

address, string, uint, bool

1. address - crypto wallet, smart contract
2. string - text
3. boolean - true, or false
4. uint - numbers (uint8, take less space, uint256, take more space)

[ Resource ] NazWeb