4. Types of Variables

//There are 3 types of variables in Solidity, local, state and global

//State variables are stored on the blockchain. So you can save some data into a state variable, come back a week later and the data will still be there.
//Local variables are declared inside functions and are not stored in the blockchain.
//Global variables provide information about the blockchain

//---------------- CODE ------------------

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.17;

contract MyContract {

    uint public myStateVariable; // this is a state variable
    address addr = msg.sender; // this is a global variable

    function func() external {
    
        uint notStateVariable = 123; // this is a Local variable
    }
}