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

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

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