🧠 Why is JavaScript Asynchronous? 🔄
🧵 JavaScript is single-threaded, meaning it can only execute one task at a time. But thanks to asynchronous features, it can handle multiple operations like API calls, file reads, or timers without blocking the main thread.

👨‍🔧 Tools That Enable Async Behavior:
Callback Functions
Promises
async/await
Event Loop + Web APIs

🔁 The Event Loop ensures that:
Synchronous code runs first
Asynchronous code (like setTimeout or fetch) waits in a queue
Once the call stack is empty, the async tasks are executed
🧪 Example:

javascript
console.log("1");
setTimeout(() => {
console.log("2");
}, 0);

console.log("3");
🟩 Output:
1
3
2
👉 Even with 0ms delay, setTimeout runs after synchronous code!

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