QuarterOfTheYear.js

const quarterOf = (month) => {
  let quarter;
  month <= 3 ? quarter = 1 : month > 3 & month <= 6 ? quarter = 2
  : month > 6 && month <= 9 ? quarter = 3 : quarter = 4;
  return quarter;
  
}

console.log(quarterOf(4))


//const quarterOf = m => Math.ceil(m/3); the cleverest solution