Arrow Functions

// Arrow function
const calcAge3 = birthYear => 2037 - birthYear;
const age3 = calcAge3(1988);
console.log(age3);

const yearsUntilRetirement = (birthYear, firstName) => {
    const age = 2037 - birthYear;
    const retirement = 65 - age;
    // return retirement;
    return `${firstName} retires in ${retirement} years`;
}

console.log(yearsUntilRetirement(1988, 'Sunny'));
// prints Sunny retires in 16 years