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Lazy Evaluation

Learn how to use lazy evaluation with std::views::iota in the C++20 ranges library to generate finite and infinite sequences. Understand how to filter and process these sequences efficiently, demonstrated by finding prime numbers starting from a large initial value.

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std::views::iota is a range factory for creating a sequence of elements by successively incrementing an initial value. This sequence can be finite or infinite.

Filling vector with views::iota

The following program fills a std::vector with 1010 int’s, starting with 00 ...