Hi so I have this nifty lab I am doing, and I got it working very well. However, I cannot figure out how to ask the user if they want to play again. Any help?

HTML Code:
<html>
<head>
<title> Lab 11 - #3 </title>
</head>
<script>
    
    var guess = -1; // Set guess to a value outside the range of valid values
    for (i=1; i <= 5; i++) {
    var num1 = parseInt(Math.random()*10); // get a number between 0 and 9 
    var num2 = parseInt(Math.random()*10); // get a number between 0 and 9 
    sum = num1 + num2;
        
    // Use a while loop

    while (guess != sum)
    {
    
        guess = prompt("Enter the correct answer for "+num1+" + "+num2, '')
        if (guess == sum)
        {
            alert("Correct!");
            
        }
        else if (guess < sum)
        {
            alert("Guess higher ");
        }
        else
        {
            alert("Guess lower");
        }
    }    
    }
	if (confirm("Play again?")) {
  document.reset( );
}
</script>
</body>
</html>
?