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API (Application Programming Interface)

An API (Application Programming Interface) is a set of protocols and tools that allows different software applications to communicate with each other. APIs define how requests and responses should be structured, enabling developers to integrate external services, access data, and extend functionality without building everything from scratch.

Why It Matters

APIs are the backbone of modern software. They power everything from mobile app backends to payment processing, social media integrations, and cloud services. Without APIs, every application would need to be a self-contained island. Understanding APIs is essential for building connected, scalable software.

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