Basic Function Excercise..

Create File Name Called BasicMath.sol in Remix Studio..

Copy this below code And Deploy that on Base Sepolia..Don't Forgot You need to Deploy this on Base sepolia Testnet


// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

/**
 * @title BasicMath
 * @dev Provides safe addition and subtraction without using SafeMath library.
 * Returns a result and a boolean error flag.
 */
contract BasicMath {

    /// @notice Adds two unsigned integers and checks for overflow.
    /// @param _a First number
    /// @param _b Second number
    /// @return sum The sum of the inputs or 0 if overflow occurs
    /// @return error True if overflow occurred, false otherwise
    function adder(uint _a, uint _b) public pure returns (uint sum, bool error) {
        unchecked {
            sum = _a + _b;
            if (sum < _a) {
                // Overflow occurred
                return (0, true);
            }
            return (sum, false);
        }
    }

    /// @notice Subtracts two unsigned integers and checks for underflow.
    /// @param _a First number
    /// @param _b Second number
    /// @return difference The difference or 0 if underflow occurs
    /// @return error True if underflow occurred, false otherwise
    function subtractor(uint _a, uint _b) public pure returns (uint difference, bool error) {
        unchecked {
            if (_b > _a) {
                // Underflow occurred
                return (0, true);
            }
            difference = _a - _b;
            return (difference, false);
        }
    }
}