odin-default-js-exercises/06_leapYears/leapYears.js

const leapYears = function(year) {
    if ( year % 100 === 0 && year % 400 != 0) {
        return false;
    } else if ( year % 4 === 0|| year % 400 === 0) {
        return true;
    } else {
        return false;
    }

};

// Do not edit below this line
module.exports = leapYears;