Differences Between Null and Undefined in JavaScript

Understanding the Differences Between Null and Undefined in JavaScript. In JavaScript, null and undefined represent different types of absence of value, with null indicating an intentional absence and undefined signifying a default state when a variable is declared but not initialized. Developers should use null to explicitly mark a variable as empty and undefined for uninitialized variables or properties that do not exist. Misusing these terms can lead to bugs, so maintaining consistency in their application is crucial for clear and maintainable code. Understanding these distinctions enhances code quality and reduces errors.