shoutGreetings challenge

shoutGreetings does not return anything.
Either you write

const shoutGreetings = arr => arr.map(word => {
  return word.toUpperCase() + ‘!’
});

(no curly braces around the outer function implies return)

or you write

const shoutGreetings = arr => {
  return arr.map(word => {
    return word.toUpperCase() + ‘!’
  })
};