JavaScript Question of the Day March 21, 2025

In the following program:

let dx = 5;
let dy = 5;

let circle;

function main() {
    circle = new Circle(50);
    circle.setPosition(getWidth() / 2, getHeight() / 2);
    keyDownMethod(down);
    add(circle);
}

function down(e) {
    if (e.key == "a") {
        circle.move(-dx, 0);
    } else if (e.key == "d") {
        circle.move(dx, 0);
    } else if (e.key == "w") {
        circle.move(0, -dy);
    } else if (e.key == "s") {
        circle.move(0, dy);
    } else {
        circle.setColor(Randomizer.nextColor());
    }
}

main();

How can the user move the circle left on the canvas?

1. Correct Answer
   Incorrect Answer
   a

   By pressing the left arrow key

2. Correct Answer
   Incorrect Answer
   b

   By pressing the d key

3. Correct Answer
   Incorrect Answer
   c

   By pressing the a key

4. Correct Answer
   Incorrect Answer
   d

   None of the keys will move the circle since the down() function needs to be called move() in order to move the graphic.