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Full Stack JavaScript Techdegree Student 18,029 PointsBuild a quiz challenge-using 2 dimensional arrays:
Greetings, Here is my code to build a quiz using arrays The console returns this error
Uncaught TypeError: Cannot read property '0' of undefined at quiz.js:12 I checked and for some reason, it can't read my array at [i][0];
can anyone explain my problem? here's my code:
var questions = [ ['how many apples are in a tree','7'] ['how many groundhogs are there','1'] ];
var correctAnswers = 0 var question; var response; var html;
for(i=0;i<questions.length;i++){ question = questions[i][0]; answer = questions[i][1]; response=parseInt(prompt(question)); if(response===answer){ correctAnswers+=1; } } html='you got'+correctAnswers+'questions correct'; print(html);
2 Answers
Steven Parker
231,275 PointsI see two issues with the declaration of "questions":
- there should be a comma between the two inner arrays
- based on how the code uses them, the answers should be numbers instead of strings
var questions = [
["how many apples are in a tree", 7],
["how many groundhogs are there", 1]
];
luther wardle
Full Stack JavaScript Techdegree Student 18,029 Pointsthanks! yes my main problem was forgetting to add the "," between my inner list of Arrays haha it runs great now!