age.js

process.stdin.resume()
process.stdin.setEncoding('utf8')


const currentYear = new Date().getFullYear();
const birthYear = (age) => {
    if (age.isNaN || age > 99) {
      } else{
          let numYears = currentYear - age;
          if (numYears < currentYear) {
              return numYears;
          }
      }
      
};


console.log('How old are you ? ')
process.stdin.on('data', (number) => {
  console.log('You were born in the year ' + birthYear(number));
  process.exit()
})