callback

A callback is a way for a program to continue working after completing a specific task, like waiting for an answer. Instead of stopping, the program hands over control to another function (the callback), which gets executed once the task finishes. Think of it like scheduling a reminder: you set what should happen later, and when the time comes, the reminder alerts you to continue with the next steps. Callbacks are commonly used in programming to handle tasks that take time, such as loading data or waiting for user input, ensuring everything runs smoothly without blocking other operations.