How to make an output Absolute Value in Javascript?

Question

const calcAge = function (birthYear) {
    return 2022 - birthYear
}

const yearsUntilRetirement = function (birthYear, firstName) {
  const age = calcAge(birthYear);
    const retierment = 65 - age;

    if(retierment > 0) {
        console.log(`${firstName} retires in ${retierment} years!`);
        return retierment;
    } else {
        console.log(`${firstName} has already retired!`);
        return `${firstName} retired ${retierment} years ago.`;
    }

}

console.log(yearsUntilRetirement(1954, 'John'));

Its outputting -3. Not sure what to do. Thanks in advance.

I tried ${|firstname|}. That didn't work.