Cannot get my code to add lowercase answers as correct. HALP

So I'm obviously new to JavaScript and I've been looking at my code for a while attempting to come up with solutions for having my answers (madrid, dublin, london) all accepted in lowercase.

It currently works fine when entering the answers in uppercase.

I can imagine that there are various ways to make this code more efficient so any feedback would be appreciated however I'm really just looking to understand why neither the following two approaches seem to work

a) answer = answer..toUpperCase (added below "answer = prompt(quiz [i][0])")

b) creating a function to convert the prompt's input to uppercase and then calling the function before the if statement.

code

```var quiz = [ ['What is the capital of Spain?', 'MADRID'], ['What is the capital of Ireland?', 'DUBLIN'], ['What is the capital of England?', 'LONDON'] ]; var answer; var score = 3; var correct = []; var inCorrect = [];

for (var i = 0; i < quiz.length; i += 1) { answer = prompt(quiz [i][0]) if (answer != quiz[i][1]) { inCorrect.push(quiz[i][0]) --score; } else { correct.push(quiz[i][0]) } }

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

var message = ("You got " + score + " question(s) right." + "<p><h2> You got these questions correct: </p></h2>" + "<p>" + correct.join('<p> ') + "</p>" + "<p><h2> You got these questions incorrect: </p></h2>" + inCorrect.join('<p> '));

displayHTML();```