The `OptionalDouble.get` function is used in C++ to retrieve the value stored within an `OptionalDouble` object.
An `OptionalDouble` is a wrapper class that can hold either a double value or no value at all. It is commonly used when a function or method may not always return a valid double value, allowing for the possibility of returning an empty or null value instead.
The `OptionalDouble.get` function provides a convenient way to access the stored value within an `OptionalDouble` object. If the `OptionalDouble` contains a valid double value, it will be returned. However, if the `OptionalDouble` is empty, invoking `get` will typically result in an exception or an error message.
It is important to check if the `OptionalDouble` contains a value before invoking `get`. This can be done using the `OptionalDouble.isPresent` function, which returns `true` if a value is present and `false` otherwise.
Overall, `OptionalDouble.get` allows for safe retrieval of a double value from an `OptionalDouble` object, providing flexibility and error handling in situations where the value may or may not be present.
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