calc.js

function calculator(operation, a, b) {
    if(operation == "add") {
        return a + b;
    }else if(operation == "subtract") {
        return a - b;
    }else if(operation == "multiply") {
        return a * b;
    }else if(operation == "divide") {
        return a / b;
    }else {
        return "Invalid operation";
    }
}

console.log(calculator("add", 2, 3))
console.log(calculator("subtract", 2, 3))
console.log(calculator("multiply", 2, 3))
console.log(calculator("divide", 2, 3))
console.log(calculator("modulus", 2, 3))