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Function loops are repetitive structures that allow us to execute a block of code multiple times. They are particularly useful when we want to perform a task repeatedly or iterate through a collection of items. In programming, there are two types of function loops: "for" and "while" loops. A "for" loop runs for a specified number of iterations, iterating over a sequence or range of values. It is often used when we know the exact number of times the loop needs to run. On the other hand, a "while" loop runs until a certain condition becomes false. It is commonly used when the number of iterations is unknown beforehand.Function loops enable us to write more efficient and concise code as they eliminate redundancy and improve our programs' flexibility. They play an essential role in controlling program flow and executing repetitive tasks effortlessly.

The main products of the function loops are repetition and iteration.