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Asynchronous programming, also known as async programming, is a technique that allows your code to execute multiple tasks concurrently, improving the overall performance and responsiveness of your application. In traditional synchronous programming, code is executed sequentially, one line at a time, waiting for each task to complete before moving on to the next one. Asynchronous programming, on the other hand, enables your code to execute tasks in parallel, allowing for more efficient use of system resources.
To do something asynchronically means to perform a task where the participants or components do not need to be present or active at the exact same moment. It is the opposite of "synchronically," which implies real-time, simultaneous interaction.