readlinesync.js

const readline = require('readline-sync');

// Ask for the user's name
const userName = readline.question("Enter your name: ");
console.log(`\nHello, ${userName}! Let's start the quiz.\n`);

// Score tracker
let score = 0;

// Question 1
let answer1 = readline.question("What is the data type of `42` in JavaScript? ");
if (answer1.trim().toLowerCase() === "number") {
    console.log("Correct.\n");
    score++;
} else {
    console.log("Incorrect. The correct answer is: number\n");
}

// Question 2
let answer2 = readline.question("Which symbol is used for addition? ");
if (answer2.trim() === "+") {
    console.log("Correct.\n");
    score++;
} else {
    console.log("Incorrect. The correct answer is: +\n");
}

// Question 3
let answer3 = readline.question("What does `typeof null` return? ");
if (answer3.trim().toLowerCase() === "object") {
    console.log("Correct.\n");
    score++;
} else {
    console.log("Incorrect. The correct answer is: object\n");
}

// Question 4
let answer4 = readline.question("What is 10 % 3? (Enter a number) ");
if (answer4.trim() === "1") {
    console.log("Correct.\n");
    score++;
} else {
    console.log("Incorrect. The correct answer is: 1\n");
}

// Question 5
let answer5 = readline.question("Which keyword declares an unchangeable variable? ");
if (answer5.trim().toLowerCase() === "const") {
    console.log("Correct.\n");
    score++;
} else {
    console.log("Incorrect. The correct answer is: const\n");
}

// Display final score
console.log(`Quiz finished, ${userName}. Your score: ${score}/5.\n`);