Solidity Programming Essentials

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

contract Test {

    uint256 public n1;
    uint256 public n2;

    struct C {
        uint256 el;
        address ad;
    }

    event EventName(uint256 p1, address indexed p2);

    mapping(address => uint256) public balances;

    constructor (uint256 t1, uint256 t2) {
        n1 = t1;
        n2 = t2;
    }

    function test(uint256 newN1) public returns(uint256) {
        n1 = newN1;
        emit EventName(n1, msg.sender);
        return balances[msg.sender];
    }

    function updateBalance(uint256 newBalance) public {
        balances[msg.sender] += newBalance;
    }

    function testView() public view returns(uint256) {
        return n1;
    }

    function testPure() public pure returns(uint256) {
        return 5+5;
    }

}