Spot the bug - #76

programming web dev
1

Find the bug in this animation loop.

let x = 0;
function tick() {
  x + 2;
  requestAnimationFrame(tick);
}
tick();

Reply with what is broken and how you would fix it.

2

x + 2; doesn’t mutate anything — it just evaluates and throws the result away, so x stays 0 forever.

Change it to an assignment, e.g. x += 2; (or x = x + 2;) inside tick() so the loop actually advances state.