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JavaScript

Zsolt Stegena
Zsolt Stegena
5,719 Points

How to implement random generator to my quiz

I have the code below, it's quite similar to Dave's one. I would like to make it works like choosing the questions randomly. I only know that I need to use Math.floor( Math.random()) function, but I don't know how. Because if I target the [i][0] element of the array with teh random function, how can I target the connecting answer? I need an assistance. Thanks for your answer in advance.

function print(message) { document.write(message); }

var questQ = [ [" 4x1",4], [" 4x2",8], [" 4x3",12], [" 4x4",06], [" 4x5",20], [" 4x6",24], [" 4x7",28], [" 4x8",32], [" 4x9",36], [" 4x10",40] ]; var correctAns =0; var goodOnes = []; var wrongOnes = [];

for (var i=0; questQ.length>i; i+=1){ var question = parseInt(prompt(questQ[i][0])); var answer = parseInt(questQ[i][1]); if (answer === question){ correctAns +=1; goodOnes.push(i + ". " + questQ[i][0]); } else { wrongOnes.push(i + ". " + questQ[i][0]); } }

var html = "Out of ten question " + correctAns + " were good" + "<br></br>"; print(html);

print("Good ones: " + "<br></br>" + goodOnes + "<br></br>"); print("Wrong ones: " + "<br></br>" + wrongOnes);

1 Answer

Steven Parker
Steven Parker
229,608 Points

Just like you are doing now by picking the indexes in sequence, you just pick an index using random and then use that same index for both the question and the answer.

To ask 10 random questions, instead of:

for (var i=0; questQ.length>i; i+=1) {

...do something like:

for (var c=0; c<10; c++) {
    i = Math.floor(Math.random() * 10);

Of course, there's no guarantee that every question will be different this way.

Oh, and 4x4 is not 6. :grin: