What is the difference between setTimeout() and setInterval() in Node.js?

Question

Accepted Answer

**setTimeout** — executes once after delay. **setInterval** — executes repeatedly.

**setTimeout:**
- Executes once.
- After specified delay.
- Returns timer object.

```javascript
setTimeout(() => {
    console.log("Executes once after 2s");
}, 2000);
```

**setInterval:**
- Executes repeatedly.
- Every specified interval.
- Returns timer object.

```javascript
setInterval(() => {
    console.log("Executes every 2s");
}, 2000);
```

**Clearing timers:**
```javascript
const timer = setTimeout(() => {
    console.log("Hello");
}, 2000);

clearTimeout(timer);  // Cancel

const interval = setInterval(() => {
    console.log("Hello");
}, 2000);

clearInterval(interval);  // Cancel
```

**Key differences:**
- **setTimeout** — once.
- **setInterval** — repeated.

Node.js: What is the difference between setTimeout() and setInterval() in Node.js?