Task 1: Create a calculator class and implement addition program ( calculator.js)

   class Calculator {
        add(a,b){
            return a+b;
        }
    }
    exports.Calculator = Calculator;

Task 2: Create a test file - test-calculator.js

• Import the addition.js file using require

    const {Calculator} = require("./calculator");

    //create an object for the class
    const calculatorObj = new Calculator();
    // call the add method 
    let result = calculatorObj.add(2,3);
    console.log(result);

Task 3: Run the program

    node test-calculator.js