NextQuestion.js

const questions = [
  'WHats your name ?',
  'The book is on the table ?',
  'The car is moving ?',
  'Is the best or worst driver you see ?'
]

let currentQuestion = 0

const showQuestion = () => {
  console.log(questions[currentQuestion])
}

const nextQuestion = () => {
  if (questions.length > 0 && currentQuestion < questions.length)
  {
    currentQuestion += 1
  }
  showQuestion()
}

const prevQuestion = () => {
  if (questions.length > 0 && currentQuestion > 0)
  {
    currentQuestion -= 1
  }
  showQuestion()
}