Description: The ‘Extension Function’ in Kotlin is a concept that allows developers to add new functionalities to existing classes without the need to modify their source code. This is achieved by defining a function outside of the class, but which can be invoked as if it were a member of the same. This approach promotes code reuse and separation of concerns, making it easier to extend the capabilities of classes without the need for inheritance. Extension functions are particularly useful in situations where one wants to add methods to external library classes or to classes that cannot be modified directly. Additionally, Kotlin allows the creation of extension functions for both standard data types and custom classes, which broadens their applicability. Extension functions do not alter the original class structure but provide a way to add additional functionality in a clean and organized manner. This approach is part of Kotlin’s design philosophy, which aims to make code more readable and expressive, allowing developers to work more efficiently and effectively.
