JavaScript Comparison Operators

== vs ===

`==` allows type coercion, `===` doesn't:

```javascript 5 == '5'; // true (coerces types) 5 === '5'; // false (strict) ```

Always Use ===

```javascript null == undefined; // true null === undefined; // false

0 == false; // true 0 === false; // false ```

Key Takeaway

Use === for strict comparison. Avoids type coercion bugs. Essential best practice.