The full form of **API** is **Application Programming Interface**. An API is a set of rules and protocols that allow different software applications to communicate with each other. It defines the methods and data formats that applications can use to request and exchange information.

### Key Points about API:
- **Purpose**: APIs enable developers to access specific features or data of an application, service, or platform without having to understand the underlying code.
- **Usage**: APIs are widely used in web services, enabling applications to interact over the internet. For example, social media platforms provide APIs that allow third-party applications to post updates, retrieve user data, and more.

### Further Reading
For more detailed information about APIs, you can refer to:
- [What is an API? - IBM](https://www.ibm.com/cloud/learn/api)
- [What is an API? - Red Hat](https://www.redhat.com/en/topics/api/what-is-an-api)

These resources provide comprehensive insights into the functionality and significance of APIs in software development.

What is API full form?

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The full form of API is Application Programming Interface. An API is a set of rules and protocols that allow different software applications to communicate with each other. It defines the methods and data formats that applications can use to request and exchange information.