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Thayer Y
29,789 PointsBuild a Quiz Challenge, Part 1 Solution
Hi guys, I don't know why, but the ( correctAnswer) does not increase?
var questions = [
["Where is arizona state located? " , "USA"],
["How many states are in the United States? ", "50"],
["What's my name ", "Thayer"]
];
var correctAnswer = 0;
var wrongAnswer = 0;
var question;
var answer;
var response;
var result;
function print(message) {
document.write(message);
}
for (var i = 0; i < questions.length; i +=1) {
question = questions[i][0];
answer = questions[i][1];
response = parseInt(prompt(question));
if (response === answer) {
correctAnswer +=1;
}else{
wrongAnswer +=1;
}
}
result = "You got " + correctAnswer + " question(s) right " + " And " + wrongAnswer + " questtion(s) wrong! ";
print(result);
3 Answers
Steven Parker
231,269 PointsRemove the parseInt.
You're applying parseInt to the user's input from prompt to convert the response into a number. But the correct answers that you compare with are all strings.
Thayer Y
29,789 PointsHi Steven,
its the same code in the solution video. it also didn't work when i tried that before, like this way.
response = prompt(question);
response= parseInt(response);
Steven Parker
231,269 PointsYou don't need parseInt at all. You want to compare strings with strings.
response = prompt(question); // change only this line
Anthony T
7,060 PointsI noticed this, too. It seems to be wrong in the video. It works for the code in the video because the instructor's answers are all numbers.
Albert D
998 Pointstry this :
var question = []; var answer = []; var count = 0; var correctIndex = 0; var incorrectIndex = []; question.push('Which team won the champions league in 2017?','Which country hosts the 2018 Fifa World Cup?','which country has the biggest army in the world?','Which country does not have an army but has a football team?','Which programming language is used for machine learnking and creating classifiers?'); answer.push('real madrid','russia','usa','iceland','python'); function startQuiz(question,answer) { for(var i = 0;i<question.length;i++) { var getAnswer = prompt(question[i]); getAnswer = getAnswer.toLowerCase(); if(getAnswer===answer[i]) { count++; correctIndex = i; } else { incorrectIndex.push(i); } } displayFinalScore(count,incorrectIndex); }
function displayFinalScore(count,incorrectIndex) { document.writeln("Congratulations you have got "+count+" answers right have scorred "+count*10); document.writeln("<p>following the list of incorrect questions with their answers<p>"); for(var i = 0;i<incorrectIndex.length;i++) { document.write("<p>Question : "+question[incorrectIndex[i]]+"</p>"); document.write("<p>Answer : "+answer[incorrectIndex[i]]+"</p>"); } }
startQuiz(question,answer);
Thayer Y
29,789 PointsThank you, Albert D
Steven Parker
231,269 PointsWhen posting code, be sure to use the instructions for code formatting in the Markdown Cheatsheet pop-up below the "Add an Answer" area. 