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JavaScript

Posted by Alexey Tseitlin
Alexey Tseitlin
5,866 Points

Script breaks... loop dosent work... Why?

==

Why dosent the loop work?

var correctCount = 0; // correct answer count
var wrongCount = 0; // wrong answer count

//save correct and incorect answers 
var correctAnswers = [];
var incorrectAnswers = [];

//question array 
var questions = [
  ["1+1=?", 2],
  ["2+2=?", 4],
  ["3+3=?", 6],
  ["4+4=?", 8]
];

//loop
for (var i=0; i < questions.length; i++) {
  var question = questions[i][0]); //question
  var answer = questions[i][1]); // correct answer
  var response = parseInt(prompt(question)); //user answer

 if (answer == response) {
     correctCount +=1;
     correctAnswers.push(questions[i]);

} else {
      wrongCount +=1;
      incorrectAnswers.push (questions[i]);
}


console.log (correctCount);
console.log (correctAnswers.join(", "));
console.log (wrongCount);
console.log (incorrectAnswers.join(", "));

3 Answers

Ayoub AIT IKEN
Ayoub AIT IKEN
12,314 Points

1- in your ' if ' and ' console log ' you have to use -iNcorectanswers- ( you forgot N )

2- correctanswers and incorrectanswers, you declared them as arrays, you cant assign to thema value like this a += value. you use a the push meethod :)

correctAnswers.push(Questions[i]);

3- you have to parseInt your prompt, cause you ll have a string in return .

Alexey Tseitlin
Alexey Tseitlin
5,866 Points

Made the chages but the loop doesnt work.....

//question array 
var questions = [
  ["1+1=?", 2],
  ["2+2=?", 4],
  ["3+3=?", 6],
  ["4+4=?", 8]
];

//loop
for (var i=0; i < questions.length; i++) {
  var question = questions[i][0]); //question
  var answer = questions[i][1]); // correct answer
  var response = parseInt(prompt(question)); //user answer
 }
Colin Bell
Colin Bell
29,679 Points

In your for loop, your question and answer variables have a closing parentheses at the end without any corresponding opening parentheses before them. Just remove that on both of those and you should be good.

for (var i=0; i < questions.length; i++) {
  var question = questions[i][0]); 
                             // ^ Remove this
  var answer = questions[i][1]); 
                           // ^ Remove this
  var response = parseInt(prompt(question)); 
 }
Marileen Mennerich
Marileen Mennerich
1,161 Points
Marileen Mennerich
Marileen Mennerich
1,161 Points

Your if-clause needs a double equal sign for the comparison: if (allQuestions[i][1] == prompt(allQuestions[i][0])) = assigns a value, == compares two values.

Alexey Tseitlin
Alexey Tseitlin
5,866 Points

Still get an error....

Ayoub AIT IKEN
Ayoub AIT IKEN
12,314 Points
Ayoub AIT IKEN
Ayoub AIT IKEN
12,314 Points

remove i++ and replace it with i+= 1. just to make sure !