Javascript: Where do I put Math.floor(Math.random)?

Question

Okay, I'm obviously an extreme newbie, so be gentle. As I'm learning Javascript, I'm creating a quiz to better help me retain and practice the information. The following is a sample of my code so far(the actual array has been shortened for this question).

I works fine for what it is at this point in my learning progress, except that I can't seem to use Math.floor(Math.random()) to create a non-linear q & a experience.

var qAndA = [["What starts a variable?", "var"], 
["What creates a popup with text and an OK button?", "alert()"],  
["What is the sign for a modulo?", "%"]];
function askQuestion(qAndA) {
    var answer = prompt(qAndA[0], " ");    
    if (answer === qAndA[1]) { 
        alert("yes");
    } else {
        alert("No, the answer is " + qAndA[1]);
    }
}
for (i = 0; i < qAndA.length; i++) {
    askQuestion(qAndA[i]);
} 

I've looked at all the potential answers here and elsewhere, but nothing addresses this speicific point.

Can anyone out there help me?

Answer 1

Easiest way to select a random element in an array:

var randomIndex = Math.floor(Math.random() * qAndA.length)
var randomQuestion = qAndA[randomIndex]

Now put that in a loop:

var questionsToAsk = qAndA.length
for (i = 0; i < questionsToAsk; i++) {
    var randomIndex = Math.floor(Math.random() * qAndA.length)
    var randomQuestion = qAndA[randomIndex]
    askQuestion(randomQuestion);
}