The "While (Duration)" function is a programming construct used to execute a block of code repeatedly as long as a specified condition remains true. It is commonly found in various programming languages, such as Python, Java, and C++. The loop checks the condition before each iteration, and if the condition evaluates to false, the loop terminates. This construct is useful for tasks that require repeated actions, such as processing items in a list or waiting for user input. By using "While (Duration)," developers can create efficient and controlled loops that enhance the functionality of their programs.