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Start your free trialEmbie Wong
3,180 PointsWhy can’t I just do this?
In the video, Guil makes a question variable inside the loop and uses it to get the questions in the multidimensional array. Why can’t we just make it shorter and do this?
for (let i = 0; i < questions.length; i++) { let answers = prompt (questions[i][0]); }
I tried this and it didn’t work, if someone can explain why it doesn’t work and why you need another variable, that would be much appreciated. Thanks!
4 Answers
Steven Parker
231,109 PointsWhat you did does make the code more compact by eliminating the need for the third variable (question), but you still need the other two to hold the correct answer (answer) and what the user inputs (response).
You could take the concept further and eliminate all the variables by folding the values into the conditional expression, though it might be a bit more complicated to read:
for (let i = 0; i < questions.length; i++) {
if (prompt(questions[i][0]) === questions[i][1]) {
correctAnswers++;
}
}
Embie Wong
3,180 PointsOk, thanks!
Just to confirm, the questions variable isn’t necessary, but the answer and response variables are? An additional question; why does the answer variable need to be declared instead of just directly putting it into the conditional statement from the array itself? Does it have something to do with the variable scopes?
Steven Parker
231,109 PointsTake another look at my example, it does eliminate all 3 variables by using the the array in the conditional.
kevin hudson
Courses Plus Student 11,987 PointsThis works for me.
for(let i = 0; i < questions.length; i++){
let answer = prompt(questions[i][0]);
if(answer){
answer = answer.toLowerCase();
}
if(questions[i][1] === answer){
correct ++;
}
}
Jessy Lee
6,932 PointsThis works for me
for (let i = 0; i<quizList.length; i++){
let quiz = prompt(quizList[i][0]);
if (quiz=== quizList[i][1]){
console.log(${answer}
);
answer++;
}
}