API is a set of routines, protocols, and tools for building software applications, and SDK is typically a set of software development tools that allow the creation of applications for a certain software package, software framework, hardware platform, computer system, video game console, operating system, or similar development platform. In this essay, we will explain API Vs SDK.
Difference Between API and SDK
API (Application Programming Interface) An API is like a recipe as it is a set of programming instructions and standards to use when accessing an online tool or database. Software companies often provide their API for free in a trial, allowing coders to create a proof-of-concept for their idea. APIs come in many shapes and sizes. The browser that a reader would likely use to peruse the Nordic APIs website uses a variety of API sets in order to convert user commands into usable functions, request data from servers, render that data into a viewable format for the user, and validate the performance of their requests. Perhaps most important is the fact that APIs allow for consistency. In the early years of programming, the computer was a wild west of commands and instructions, loosely coded and rarely documented. With the advent of modern computing, APIs have allowed for consistent coding in stable environments, allowing for replicable functions to be delivered the same every time the request is submitted with reliability and predictability.
SDK (Software Development Kit) A SDK may contain an API or even sometimes many APIs. So an API is part of an SDK but an SDK is never part of an API. An SDK or devkit functions in much the same way, providing a set of tools, libraries, relevant documentation, code samples, processes, and or guides that allow developers to create software applications on a specific platform. If an API is a set of building blocks that allow for the creation of something, an SDK is a full-fledged workshop, facilitating creation far outside the scopes of what an API would allow. SDKs are the origination sources for almost every program a modern user would interact with. From the web browser you work on all the way to the video games you play at the end of the day, many were first built with an SDK, even before an API was used to communicate with other applications.
Both of them are, conceptually, a way for your program to interface with and control the resources provided by another piece of software, whether that other software is a web service, an end-user app, an OS service or daemon, or a kernel device driver.