an arithmetic library with examples

library.sol

//SPDX-License-Identifier: MIT

pragma solidity ^0.8.8;


library arithmetic{
//Add two numbers together
    function add(uint num1, uint num2) external pure returns(uint){
        uint result = num1 + num2;
        return result;
    }
//Subtracts two numbers
    function subtract(uint num1, uint num2) external view returns(uint){
        uint result = num1 - num2;
        return result;
    }
//Multiply two numbers
    function multiply(uint num1, uint num2) external pure returns(uint){
        uint result = num1 * num2;
        return result;
    }
//divide two numbers
    function divide(uint num1, uint num2) external pure returns(uint){
        uint result = num1 / num2;
        return result;
    }
//modulo of two numbers
    function modulo(uint num1, uint num2) external pure returns(uint){
        uint result = num1 % num2;
        return result;
    }
//Exponential of two numbers
    function exponential(uint num1, uint num2) external pure returns(uint){
        uint result = num1 ** num2;
        return result;
    }

}


contract Test {
    //using the library
        using arithmetic for uint;

        // uint results;

        uint _num1 = 5;
        uint _num2 = 6;
       uint public results = _num1.add(_num2);

        function getExponent(uint num1, uint num2) external view returns(uint){
            return num1.exponential(num2);
        }
    }