Simple calculator

function simpleCalculator(num1, num2, operator) {
    let result = 0;

    switch(operator) {
        case "add": result = (num1, num2) => num1 + num2; break;
        case "subtract": result = (num1, num2) => num1 - num2; break;
        case "multiply": result = (num1, num2) => num1 * num2; break;
        case "divide": result = (num1, num2) => num1 / num2; break;
    }
    console.log(result(num1, num2));
}