//SPDX-License-Identifier: MIT pragma solidity 0.8.26;

contract Calculator {

function add(uint256 num1, uint256 num2) public pure returns (uint256) {
    return num1 + num2;
}


function subtract(uint256 num1, uint256 num2) public pure returns (uint256) {
    require(num1 >= num2, "Result would be negative");
    return num1 - num2;
}

function multiply(uint256 num1, uint256 num2) public pure returns (uint256) {
    return num1 * num2;
}

function divide(uint256 num1, uint256 num2) public pure returns (uint256) {
    require(num2 != 0, "Cannot divide by zero");
    return num1 / num2;
}

function mod(uint256 num1, uint256 num2) public pure returns (uint256) {
    require(num2 != 0, "Cannot modulo by zero");
return num1%num2;
}

}