Why does the var numCorrect not work above the for loop?

var quiz = [
['Street number?', 21],
['(100 * 2) in Dollars?', 200],
['Avg. Pomodoro sessions per day?', 8]
];

var correct ='<ol>' + '<h2>Correct: </h2>';
var incorrect = '</ol><ol>' + '<h2>Wrong: </h2>';
var count = 0; 


for (var i = 0; i < quiz.length; i += 1){

    var answer = parseInt(prompt(quiz[i][0]));
    var count = count;
    if (quiz[i][1] === answer) {
        correct += '<li>' + quiz[i][0] + '</li>';
        count += 1;     
    }
    else {
        incorrect += '<li>' + quiz[i][0] + '</li>';
    }

}
// why do I need to place the var numCorrect after the for loop? //
var numCorrect = '<p>You have ' + count + ' correct questions! Anyways, keep on learning!</p>';
document.write(numCorrect);
document.write(correct);
document.write(incorrect);