Generaattorifunktiota

Generaattorifunktiota, also known as a generator function in English, is a special type of function in programming that allows for the creation of an iterator. It is a powerful tool in Python and other programming languages that support this feature. A generator function uses the yield keyword instead of return to produce a series of values over time, rather than computing them at once and sending them back like a regular function.

When a generator function is called, it does not execute immediately. Instead, it returns a generator object that can be iterated over. Each time the next() function is called on the generator object, the function resumes where it left off, executing until it hits another yield statement. This process continues until the function reaches its end, at which point it raises a StopIteration exception.

Generator functions are particularly useful for working with large datasets or streams of data, as they allow for efficient memory usage by generating values on-the-fly rather than storing them all in memory at once. They are also useful for implementing iterators and coroutines, which are more advanced programming concepts.

In summary, generaattorifunktiota is a function that returns an iterator and generates values on-the-fly using the yield keyword. It is a powerful tool for efficient memory usage and implementing iterators and coroutines.