An __________ is a software interface that enables the interaction between two apps

An API (Application Programming Interface) is a software interface that enables the interaction between two applications. It allows different software systems to communicate with one another, sharing data and functionalities seamlessly. APIs define the methods and data formats that applications must use to request and exchange information, making it easier for developers to integrate different services or features into their applications.

APIs are essential in modern software development, as they help in building complex systems from simpler components. For instance, when a developer wants to integrate Google Maps into their application, they utilize the Google Maps API. This interface provides the necessary functions to access map data and functionalities without needing to understand the internal workings of Google's mapping services.

Additionally, APIs can be categorized into various types, such as web APIs, operating system APIs, library APIs, etc., based on their usage and the environment in which they operate. In summary, APIs are foundational in building software that requires interoperability between different systems.