nested-variable.js

const personOne = {
  firstName: “Denny”,
  lastName: “Scott”,
  contact: {
    phoneNumber: 555–555–5555,
    twitter: “
@gitinbit”
  }
}
function getUserForPhoneDirectory(person) {
  if(person && person.firstName && person.lastName && person.contact && person.contact.phoneNumber) {
    return `${person.firstName} ${person.lastName} — ${person.contact.phoneNumber}`
  }
}
getUserForPhoneDirectory(personOne); //expect: Denny Scott — 555–555–5555