Quest App How old are you?

quest.js

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

console.log('Computer: How old are you? ')
process.stdout.write('Me: ');
process.stdin.on('data', (age) => {
  console.log('Computer: Tienes ' + age.trim()+ ' años.');
  if (!Number(age)){
      console.log('¿eh?')
  } else if (age > 99) {
      console.log('Computer: ¿Seguro que no estas muerto ya?')
  } else if (age < 1) {
      console.log('Computer: ¿Eres del futuro?')
  } else {
    var year=2019;
    var birth=year-age;
    console.log('Computer: Nacistes en el '+ birth +'.')
  }
process.exit()
})