Introduction to Quiz Application

In this tutorial, we will build a simple quiz application using React. This application will ask users a series of questions and display the results at the end.

Step 1: Setting up the Project

First, we need to set up a new React project. We can do this by running the following command in our terminal:

npx create-react-app quiz-app

Step 2: Creating the Quiz Component

Next, we need to create a new component for our quiz application. We can do this by creating a new file called Quiz.js in the src directory:

import React, { useState } from 'react';

function Quiz() {
  const [questions, setQuestions] = useState([
    { question: 'What is the capital of France?', answer: 'Paris' },
    { question: 'What is the largest planet in our solar system?', answer: 'Jupiter' },
    { question: 'Who painted the Mona Lisa?', answer: 'Leonardo da Vinci' }
  ]);
  const [currentQuestion, setCurrentQuestion] = useState(0);
  const [score, setScore] = useState(0);
  const [userAnswer, setUserAnswer] = useState('');

const handleNextQuestion = () => {
    if (userAnswer === questions[currentQuestion].answer) {
      setScore(score + 1);
    }
    setCurrentQuestion(currentQuestion + 1);
    setUserAnswer('');
  };

return (
    <div>
      {currentQuestion < questions.length ? (
        <div>
          <p>{questions[currentQuestion].question}</p>
          <input type='text' value={userAnswer} onChange={(e) => setUserAnswer(e.target.value)} />
          <button onClick={handleNextQuestion}>Next</button>
        </div>
      ) : (
        <div>
          <p>Quiz finished! Your score is {score} out of {questions.length}.</p>
        </div>
      )}
    </div>
  );
}

export default Quiz;