JavaScript miscellaneous

switchCase.js

let calculate = (no1, no2, operation) => {
    let result;
    switch (operation) {
        case 'add':
            result = no1 + no2;
            break;
        case 'subtract':
            result = no1 - no2;
            break;
    }
    return result;
};
console.log(calculate(2,2,'add'));