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JavaScript JavaScript Arrays Multidimensional Arrays Build a Quiz Challenge – One Solution

Posted by Obe Juarez
Obe Juarez
6,357 Points

When i prompt the questions, all of the questions i my array and answers pop up in every PROMPT box?

this is my code, its just like the video

const questions = [ ['What is the capitol of California','sacramento'], ['How many states are the in the USA?', '50'], ['How many fingers in the regular hand?', '10'] ];

let correctAnswers = 0;

for (let i = 0; i < questions.length; i++) { let question = questions[i][0]; let answer = questions[i][1]; let response = prompt(questions);

if (response === answer) {
    correctAnswers++
}

}

1 Answer

Thomas Lian Ødegaard
Thomas Lian Ødegaard
9,540 Points
Thomas Lian Ødegaard
Thomas Lian Ødegaard
9,540 Points

It shows all the questions, because you put the whole array in the prompt method instead of a single question.

This:

let response = prompt(questions);

Should be changed to this:

let response = prompt(question);

The code will therefore look like this:

const questions = [ ['What is the capitol of California','sacramento'], ['How many states are the in the USA?', '50'], ['How many fingers in the regular hand?', '10'] ];

let correctAnswers = 0;

for (let i = 0; i < questions.length; i++) { 
  let question = questions[i][0]; 
  let answer = questions[i][1]; 
  let response = prompt(question);

  if (response === answer) {
    correctAnswers++
    console.log(correctAnswers);
  }
}

I would prefer using a foreach method on the array instead of a for loop:

// Go through each question in the questions array
questions.forEach(question => {
  // Get the correct answer from the array
  let answer = question[1];
  // Show the prompt with the question and get the response from the user
  let response = prompt(question[0]);
  // Check if the user response is the same as the answer from the array
  if (response === answer) {
    // Add 1 to the "correctAnswers" variable if the answer is correct 
    correctAnswers++
  }  
});